diff --git a/src/vs/workbench/contrib/chat/common/tools/languageModelToolsContribution.ts b/src/vs/workbench/contrib/chat/common/tools/languageModelToolsContribution.ts
index 33a003f044aaa..b80c776556b86 100644
--- a/src/vs/workbench/contrib/chat/common/tools/languageModelToolsContribution.ts
+++ b/src/vs/workbench/contrib/chat/common/tools/languageModelToolsContribution.ts
@@ -15,7 +15,7 @@ import { ILogService } from '../../../../../platform/log/common/log.js';
 import { IWorkbenchContribution } from '../../../../common/contributions.js';
 import { ILanguageModelToolsService, IToolData } from '../languageModelToolsService.js';
 import * as extensionsRegistry from '../../../../services/extensions/common/extensionsRegistry.js';
-import { toolsParametersSchemaSchema } from './languageModelToolsParametersSchema.js';
+import { toolsParametersSchemaSchemaId } from './languageModelToolsParametersSchema.js';
 
 export interface IRawToolContribution {
 	name: string;
@@ -84,8 +84,8 @@ const languageModelToolsExtensionPoint = extensionsRegistry.ExtensionsRegistry.r
 					type: 'string'
 				},
 				parametersSchema: {
-					...toolsParametersSchemaSchema,
 					description: localize('parametersSchema', "A JSON schema for the parameters this tool accepts. The parameters must be an object at the top level. A particular language model may not support all JSON schema features. See the documentation for the language model family you are using for more information."),
+					$ref: toolsParametersSchemaSchemaId,
 				},
 				canBeReferencedInPrompt: {
 					markdownDescription: localize('canBeReferencedInPrompt', "If true, this tool shows up as an attachment that the user can add manually to their request. Chat participants will receive the tool in {0}.", '`ChatRequest#toolReferences`'),
diff --git a/src/vs/workbench/contrib/chat/common/tools/languageModelToolsParametersSchema.ts b/src/vs/workbench/contrib/chat/common/tools/languageModelToolsParametersSchema.ts
index 336aa24244d21..72a12bced9927 100644
--- a/src/vs/workbench/contrib/chat/common/tools/languageModelToolsParametersSchema.ts
+++ b/src/vs/workbench/contrib/chat/common/tools/languageModelToolsParametersSchema.ts
@@ -4,13 +4,16 @@
  *--------------------------------------------------------------------------------------------*/
 
 import { IJSONSchema } from '../../../../../base/common/jsonSchema.js';
+import { Extensions as JSONExtensions, IJSONContributionRegistry } from '../../../../../platform/jsonschemas/common/jsonContributionRegistry.js';
+import { Registry } from '../../../../../platform/registry/common/platform.js';
 
 /**
  * A schema for parametersSchema
  * This is a subset of https://json-schema.org/draft-07/schema to capture what is actually supported by language models for tools, mainly, that they must be an object at the top level.
  * Possibly it can be whittled down some more based on which attributes are supported by language models.
  */
-export const toolsParametersSchemaSchema: IJSONSchema = {
+export const toolsParametersSchemaSchemaId = 'vscode://schemas/toolsParameters';
+const toolsParametersSchemaSchema: IJSONSchema = {
 	definitions: {
 		schemaArray: {
 			type: 'array',
@@ -252,3 +255,5 @@ export const toolsParametersSchemaSchema: IJSONSchema = {
 		},
 	}],
 };
+const contributionRegistry = Registry.as<IJSONContributionRegistry>(JSONExtensions.JSONContribution);
+contributionRegistry.registerSchema(toolsParametersSchemaSchemaId, toolsParametersSchemaSchema);