diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7ce8834c9be9..33a06587d22f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -42,6 +42,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ### Improvements
 
+* (x/group, x/gov) [#17109](https://github.com/cosmos/cosmos-sdk/pull/17109) Let proposal summary be 40x longer than metadata limit.
 * (all) [#16537](https://github.com/cosmos/cosmos-sdk/pull/16537) Properly propagated `fmt.Errorf` errors and using `errors.New` where appropriate.
 
 ### Bug Fixes
diff --git a/client/flags/flags.go b/client/flags/flags.go
index a2d918edde9a..c397b89be82e 100644
--- a/client/flags/flags.go
+++ b/client/flags/flags.go
@@ -76,6 +76,7 @@ const (
 	FlagOffset           = "offset"
 	FlagCountTotal       = "count-total"
 	FlagTimeoutHeight    = "timeout-height"
+	FlagKeyAlgorithm     = "algo"
 	FlagKeyType          = "key-type"
 	FlagFeePayer         = "fee-payer"
 	FlagFeeGranter       = "fee-granter"
diff --git a/client/keys/add.go b/client/keys/add.go
index 58bc313c7019..94c2b92df038 100644
--- a/client/keys/add.go
+++ b/client/keys/add.go
@@ -82,7 +82,7 @@ Example:
 
 	// support old flags name for backwards compatibility
 	f.SetNormalizeFunc(func(f *pflag.FlagSet, name string) pflag.NormalizedName {
-		if name == "algo" {
+		if name == flags.FlagKeyAlgorithm {
 			name = flags.FlagKeyType
 		}
 
diff --git a/math/CHANGELOG.md b/math/CHANGELOG.md
index 987642bf71a0..6f4d90e3e271 100644
--- a/math/CHANGELOG.md
+++ b/math/CHANGELOG.md
@@ -38,7 +38,8 @@ Ref: https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.j
 
 ## Improvements
 
-* [#16263](https://github.com/cosmos/cosmos-sdk/pull/16263) Improved math/Int.Size by computing the decimal digits count instead of firstly invoking .Marshal() then checking the length
+* [#17109](https://github.com/cosmos/cosmos-sdk/pull/17109) Add `.ToLegacyDec()` method on `math.Int` type for converting to `math.LegacyDec`.
+* [#16263](https://github.com/cosmos/cosmos-sdk/pull/16263) Improved `math/Int.Size` by computing the decimal digits count instead of firstly invoking .Marshal() then checking the length
 
 ### Bug Fixes
 
diff --git a/math/int.go b/math/int.go
index 13495ba75a5b..b94a38f8352f 100644
--- a/math/int.go
+++ b/math/int.go
@@ -154,6 +154,11 @@ func ZeroInt() Int { return Int{big.NewInt(0)} }
 // OneInt returns Int value with one
 func OneInt() Int { return Int{big.NewInt(1)} }
 
+// ToLegacyDec converts Int to LegacyDec
+func (i Int) ToLegacyDec() LegacyDec {
+	return LegacyNewDecFromInt(i)
+}
+
 // Int64 converts Int to int64
 // Panics if the value is out of range
 func (i Int) Int64() int64 {
diff --git a/simapp/simd/cmd/testnet.go b/simapp/simd/cmd/testnet.go
index cd539255b189..fdb0474a062a 100644
--- a/simapp/simd/cmd/testnet.go
+++ b/simapp/simd/cmd/testnet.go
@@ -83,7 +83,7 @@ func addTestnetFlagsToCmd(cmd *cobra.Command) {
 
 	// support old flags name for backwards compatibility
 	cmd.Flags().SetNormalizeFunc(func(f *pflag.FlagSet, name string) pflag.NormalizedName {
-		if name == "algo" {
+		if name == flags.FlagKeyAlgorithm {
 			name = flags.FlagKeyType
 		}
 
diff --git a/x/gov/README.md b/x/gov/README.md
index 683e8bbbac71..a5083274973a 100644
--- a/x/gov/README.md
+++ b/x/gov/README.md
@@ -1183,6 +1183,10 @@ where `proposal.json` contains:
 By default the metadata, summary and title are both limited by 255 characters, this can be overridden by the application developer.
 :::
 
+:::tip
+When metadata is not specified, the title is limited to 255 characters and the summary 40x the title length.
+:::
+
 ##### submit-legacy-proposal
 
 The `submit-legacy-proposal` command allows users to submit a governance legacy proposal along with an initial deposit.
diff --git a/x/gov/keeper/keeper.go b/x/gov/keeper/keeper.go
index 3396997124ce..9b2cab294276 100644
--- a/x/gov/keeper/keeper.go
+++ b/x/gov/keeper/keeper.go
@@ -183,3 +183,12 @@ func (k Keeper) assertMetadataLength(metadata string) error {
 	}
 	return nil
 }
+
+// assertSummaryLength returns an error if given summary length
+// is greater than a pre-defined 40*MaxMetadataLen.
+func (keeper Keeper) assertSummaryLength(summary string) error {
+	if summary != "" && uint64(len(summary)) > 40*keeper.config.MaxMetadataLen {
+		return types.ErrSummaryTooLong.Wrapf("got summary with length %d", len(summary))
+	}
+	return nil
+}
diff --git a/x/gov/keeper/msg_server_test.go b/x/gov/keeper/msg_server_test.go
index 3d8620a6bf42..74cdf00b4745 100644
--- a/x/gov/keeper/msg_server_test.go
+++ b/x/gov/keeper/msg_server_test.go
@@ -147,6 +147,21 @@ func (suite *KeeperTestSuite) TestSubmitProposalReq() {
 			expErr:    true,
 			expErrMsg: "metadata too long",
 		},
+		"summary too long": {
+			preRun: func() (*v1.MsgSubmitProposal, error) {
+				return v1.NewMsgSubmitProposal(
+					[]sdk.Msg{bankMsg},
+					initialDeposit,
+					proposer.String(),
+					"",
+					"Proposal",
+					strings.Repeat("1", 300*40),
+					false,
+				)
+			},
+			expErr:    true,
+			expErrMsg: "summary too long",
+		},
 		"many signers": {
 			preRun: func() (*v1.MsgSubmitProposal, error) {
 				return v1.NewMsgSubmitProposal(
diff --git a/x/gov/keeper/proposal.go b/x/gov/keeper/proposal.go
index 094b792a1943..35080aaea019 100644
--- a/x/gov/keeper/proposal.go
+++ b/x/gov/keeper/proposal.go
@@ -24,7 +24,7 @@ func (keeper Keeper) SubmitProposal(ctx context.Context, messages []sdk.Msg, met
 	}
 
 	// assert summary is no longer than predefined max length of metadata
-	err = keeper.assertMetadataLength(summary)
+	err = keeper.assertSummaryLength(summary)
 	if err != nil {
 		return v1.Proposal{}, err
 	}
diff --git a/x/gov/types/errors.go b/x/gov/types/errors.go
index 43bd7481b2ae..a5d8675b82f9 100644
--- a/x/gov/types/errors.go
+++ b/x/gov/types/errors.go
@@ -23,4 +23,5 @@ var (
 	ErrInvalidProposer         = errors.Register(ModuleName, 18, "invalid proposer")
 	ErrVotingPeriodEnded       = errors.Register(ModuleName, 20, "voting period already ended")
 	ErrInvalidProposal         = errors.Register(ModuleName, 21, "invalid proposal")
+	ErrSummaryTooLong          = errors.Register(ModuleName, 22, "summary too long")
 )
diff --git a/x/group/keeper/msg_server.go b/x/group/keeper/msg_server.go
index e27f78be0295..048b82a3566b 100644
--- a/x/group/keeper/msg_server.go
+++ b/x/group/keeper/msg_server.go
@@ -521,7 +521,7 @@ func (k Keeper) SubmitProposal(goCtx context.Context, msg *group.MsgSubmitPropos
 		return nil, err
 	}
 
-	if err := k.assertMetadataLength(msg.Summary, "proposal summary"); err != nil {
+	if err := k.assertSummaryLength(msg.Summary); err != nil {
 		return nil, err
 	}
 
@@ -1062,6 +1062,15 @@ func (k Keeper) assertMetadataLength(metadata, description string) error {
 	return nil
 }
 
+// assertSummaryLength returns an error if given summary length
+// is greater than a pre-defined 40*MaxMetadataLen.
+func (k Keeper) assertSummaryLength(summary string) error {
+	if summary != "" && uint64(len(summary)) > 40*k.config.MaxMetadataLen {
+		return errorsmod.Wrapf(errors.ErrMaxLimit, "proposal summary is too long")
+	}
+	return nil
+}
+
 // validateDecisionPolicies loops through all decision policies from the group,
 // and calls each of their Validate() method.
 func (k Keeper) validateDecisionPolicies(ctx sdk.Context, g group.GroupInfo) error {
diff --git a/x/group/keeper/msg_server_test.go b/x/group/keeper/msg_server_test.go
index 6d6d24c3b099..7cbe0a9f39c2 100644
--- a/x/group/keeper/msg_server_test.go
+++ b/x/group/keeper/msg_server_test.go
@@ -1742,6 +1742,17 @@ func (s *TestSuite) TestSubmitProposal() {
 			expErrMsg: "limit exceeded",
 			postRun:   func(sdkCtx sdk.Context) {},
 		},
+		"summary too long": {
+			req: &group.MsgSubmitProposal{
+				GroupPolicyAddress: accountAddr.String(),
+				Proposers:          []string{addr2.String()},
+				Metadata:           "{\"title\":\"title\",\"summary\":\"description\"}",
+				Summary:            strings.Repeat("a", 256*40),
+			},
+			expErr:    true,
+			expErrMsg: "limit exceeded",
+			postRun:   func(sdkCtx sdk.Context) {},
+		},
 		"group policy required": {
 			req: &group.MsgSubmitProposal{
 				Proposers: []string{addr2.String()},
diff --git a/x/staking/keeper/msg_server.go b/x/staking/keeper/msg_server.go
index 283216993679..d7fb9744a72b 100644
--- a/x/staking/keeper/msg_server.go
+++ b/x/staking/keeper/msg_server.go
@@ -177,6 +177,15 @@ func (k msgServer) EditValidator(ctx context.Context, msg *types.MsgEditValidato
 		if msg.CommissionRate.GT(math.LegacyOneDec()) || msg.CommissionRate.IsNegative() {
 			return nil, errorsmod.Wrap(sdkerrors.ErrInvalidRequest, "commission rate must be between 0 and 1 (inclusive)")
 		}
+
+		minCommissionRate, err := k.MinCommissionRate(ctx)
+		if err != nil {
+			return nil, errorsmod.Wrap(sdkerrors.ErrLogic, err.Error())
+		}
+
+		if msg.CommissionRate.LT(minCommissionRate) {
+			return nil, errorsmod.Wrapf(sdkerrors.ErrInvalidRequest, "commission rate cannot be less than the min commission rate %s", minCommissionRate.String())
+		}
 	}
 
 	// validator must already be registered