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MCP server configured in .warp/.mcp.json not accessible to Oz agent in same session #9111

@jakubkratina

Description

@jakubkratina

Bug Report

Description

When an MCP server is configured via ~/.warp/.mcp.json and shows as connected in Settings > MCP Servers (green dot, tools listed), the Oz agent in a conversation is unable to call any of its tools. list_relevant_mcp_context returns No relevant MCP context found even after starting a new conversation.

Steps to Reproduce

  1. Add an MCP server entry to ~/.warp/.mcp.json (e.g. Nightwatch via npx -y mcp-remote https://nightwatch.laravel.com/mcp).
  2. Authenticate via OAuth — the server appears as connected in Settings with 6 tools available.
  3. Open a new Oz agent conversation.
  4. Ask the agent to call one of the MCP server's tools (e.g. list_applications).

Expected Behavior

The Oz agent should be able to call tools from any MCP server that is connected and visible in Settings.

Actual Behavior

list_relevant_mcp_context returns no context. The agent cannot access the tools despite the server showing as connected in the UI.

Workaround

The same MCP server works correctly in Claude Code, confirming the server itself is functional.

Environment

  • macOS
  • MCP server: nightwatch (npx -y mcp-remote https://nightwatch.laravel.com/mcp)
  • Config location: ~/.warp/.mcp.json

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    area:agentAgent workflows, conversations, prompts, cloud mode, and AI-specific UI.area:mcpMCP server integrations, tool connections, and resource providers.bugSomething isn't working.os:macmacOS-specific behavior, regressions, or requests.ready-to-implementThe issue is ready for implementation work.repro:mediumThe report suggests a plausible repro path, but some uncertainty remains.triagedIssue has received an initial automated triage pass.

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