[BUG] MCP resources not available for subagents

Environment

• Platform (select one):
• [x] Anthropic API (Claude Code)
• Claude CLI version: 1.0.22 (Claude Code)
• Operating System: Ubuntu 24.04.2 LTS (WSL)
• Terminal: xterm

Bug Description

Subagents spawned by Claude Code do not have access to the same MCP resources, although MCP tools seem to work fine.

My .claude.json has the following:

  "mcpServers": {
    "tmdb": {
      "command": "/Code/mcp-server-tmdb/dist/index.js",
      "env": {
        "TMDB_API_KEY": "..."
      }
    }
  },

When I ask Claude to spawn a subagent to look up a resource, this happens:

Task(Task: Get Armageddon movie info
  Prompt: I want to get some info on the movie Armageddon. Search TMDB with your tool to find the film id, then
   use the tmdb resource tmdb:///movie/ to get the info.)
 ⎿  tmdb:search_movies (MCP)(query: "Armageddon")
  ⎿  Found 20 movies:
  ⎿  readMcpResource(Read resource "tmdb:///movie/95" from server "tmdb")
  ⎿  Error: Server "tmdb" not found. Available servers:
  ⎿  listMcpResources(List all MCP resources)
  ⎿  ⎿  (No resources found)

But when Claude Code accesses it directly, it works:

readMcpResource(Read resource "tmdb:///movie/95" from server "tmdb")
  ⎿ {
      "contents": [
        {
          "uri": "tmdb:///movie/95",
          "mimeType": "application/json",
          "text": "{\n  \"title\": \"Armageddon\",\n  \"releaseDate\": \"1998-07-01\",\n  \"rating\": 6.838,\n
    \"overview\": [...] }\n  ]\n}"
        }
      ]
    }

Steps to Reproduce

• Configure MCP server with resources
• Ask Claude Code to spawn subagent that uses a resource. It will fail.

Expected Behavior

MCP resources should be available to subagents in the same way as they are to the top-level Claude Code.

Actual Behavior

Subagent could not access resources.