LabMimors

Open-source tooling for inspectable, efficient AI agents.

MCP Lens for DeepSeek Harness

1,000 MCP tools. Two model-facing interfaces.

MCP Lens keeps large MCP catalogs behind mcp_search and mcp_call. DeepSeek Harness searches first, receives a small set of exact schemas, and calls one explicit server/tool pair. Allow/deny policy is checked again at call time.

Why users try it

• Reduce the standing MCP schema surface before the first useful call.
• Narrow a large tool-choice set without deleting or loosening upstream schemas.
• Keep unused MCP servers disconnected until needed.
• Fail closed: no remote tool is visible until it matches allowTools; denyTools wins.

Install

dsh plugin --profile web add dsh-mcp-lens@next

Then follow the copy-paste first-server Quickstart.

Reproducible fixed-fixture result

1,000-tool path	Model-facing MCP schemas	Tool Schema JSON
Direct exposure	1,000	647,962 B
MCP Lens	2	1,114 B

These are canonical UTF-8 schema JSON bytes from a fixed fixture—not a universal token, cost, latency, or task-quality claim.

Try it: Website · Local-only schema calculator · rc.9 Release

If MCP Lens makes a large DeepSeek Harness catalog easier to operate, star the project so other DSH users can find it.