Patch SDK to support icons in tools/list response

The @modelcontextprotocol/sdk@1.25.1 includes type definitions for icons (SEP-973)
but the runtime implementation was incomplete. The SDK's registerTool() and
_createRegisteredTool() methods didn't process the icons field, and the
listTools handler didn't include icons in responses.

This patch adds:
- Icon extraction in registerTool() config destructuring
- Icon parameter to _createRegisteredTool() signature
- Icon storage in registered tool objects
- Icon support in tool update() method
- Icon inclusion in tools/list response

With this patch, all Mapbox tools now correctly display the Mapbox organization
icon (https://avatars.githubusercontent.com/u/600935?s=200&v=4) in MCP clients
like Claude Desktop, VS Code, Cursor, and the MCP Inspector.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: mattpodwysocki

patches/@modelcontextprotocol+sdk+1.25.1.patch

@@ -32,10 +32,20 @@ index e10bb3d..2e99bee 100644
      }
      /**
 diff --git a/node_modules/@modelcontextprotocol/sdk/dist/esm/server/mcp.js b/node_modules/@modelcontextprotocol/sdk/dist/esm/server/mcp.js
-index 23639ce..7b8a325 100644
+index 23639ce..75f18b5 100644
 --- a/node_modules/@modelcontextprotocol/sdk/dist/esm/server/mcp.js
 +++ b/node_modules/@modelcontextprotocol/sdk/dist/esm/server/mcp.js
-@@ -194,15 +194,20 @@ export class McpServer {
+@@ -85,6 +85,9 @@ export class McpServer {
+                     execution: tool.execution,
+                     _meta: tool._meta
+                 };
++                if (tool.icons) {
++                    toolDefinition.icons = tool.icons;
++                }
+                 if (tool.outputSchema) {
+                     const obj = normalizeObjectSchema(tool.outputSchema);
+                     if (obj) {
+@@ -194,15 +197,20 @@ export class McpServer {
              return;
          }
          if (!result.structuredContent) {
@@ -64,3 +74,49 @@ index 23639ce..7b8a325 100644
          }
      }
      /**
+@@ -602,7 +610,7 @@ export class McpServer {
+         }
+         return registeredPrompt;
+     }
+-    _createRegisteredTool(name, title, description, inputSchema, outputSchema, annotations, execution, _meta, handler) {
++    _createRegisteredTool(name, title, description, inputSchema, outputSchema, annotations, execution, _meta, icons, handler) {
+         // Validate tool name according to SEP specification
+         validateAndWarnToolName(name);
+         const registeredTool = {
+@@ -613,6 +621,7 @@ export class McpServer {
+             annotations,
+             execution,
+             _meta,
++            icons,
+             handler: handler,
+             enabled: true,
+             disable: () => registeredTool.update({ enabled: false }),
+@@ -641,6 +650,8 @@ export class McpServer {
+                     registeredTool.annotations = updates.annotations;
+                 if (typeof updates._meta !== 'undefined')
+                     registeredTool._meta = updates._meta;
++                if (typeof updates.icons !== 'undefined')
++                    registeredTool.icons = updates.icons;
+                 if (typeof updates.enabled !== 'undefined')
+                     registeredTool.enabled = updates.enabled;
+                 this.sendToolListChanged();
+@@ -690,7 +701,7 @@ export class McpServer {
+             }
+         }
+         const callback = rest[0];
+-        return this._createRegisteredTool(name, undefined, description, inputSchema, outputSchema, annotations, { taskSupport: 'forbidden' }, undefined, callback);
++        return this._createRegisteredTool(name, undefined, description, inputSchema, outputSchema, annotations, { taskSupport: 'forbidden' }, undefined, undefined, callback);
+     }
+     /**
+      * Registers a tool with a config object and callback.
+@@ -699,8 +710,8 @@ export class McpServer {
+         if (this._registeredTools[name]) {
+             throw new Error(`Tool ${name} is already registered`);
+         }
+-        const { title, description, inputSchema, outputSchema, annotations, _meta } = config;
+-        return this._createRegisteredTool(name, title, description, inputSchema, outputSchema, annotations, { taskSupport: 'forbidden' }, _meta, cb);
++        const { title, description, inputSchema, outputSchema, annotations, _meta, icons } = config;
++        return this._createRegisteredTool(name, title, description, inputSchema, outputSchema, annotations, { taskSupport: 'forbidden' }, _meta, icons, cb);
+     }
+     prompt(name, ...rest) {
+         if (this._registeredPrompts[name]) {