{"version":"2.1.248","anchor":"missing-mcp-capabilities-return-empty-instead-of-erroring","canonical_anchor":"missing-mcp-capabilities-return-empty-instead-of-erroring","heading":"Missing MCP capabilities return empty instead of erroring","tier":"notice","area":"MCP","scope":null,"heads_up":null,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.248\/e\/missing-mcp-capabilities-return-empty-instead-of-erroring","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.248","markdown":"### Missing MCP capabilities return empty instead of erroring\n\nMCP servers that advertise no tools or prompts return empty instead of erroring.\n\n**What**\n\nA server that does not advertise tools, resources, resource templates or prompts now short-circuits to an empty list rather than making the call.\n\n**Details**\n\n- All four listings go through one memoizing wrapper keyed on server name plus config, with failures clearing the cache entry and the error recorded on the returned list.\n- `tools\/list` takes an extra branch for newer protocol versions.\n\n**Evidence**\n\n`resources\/templates\/list`\n\n- Area: MCP\n- Tier: You'll notice\n- Useful: 3\/5\n- Signal: 1\/5"}