{"version":"2.1.300","anchor":"tool-searchmcp-tool-host-request-adds-extra-tools","canonical_anchor":"tool-searchmcp-tool-host-request-adds-extra-tools","heading":"Sessions with a tool host interface send Claude extra tools","tier":"internal","area":"Tool Host","scope":"individual","heads_up":false,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.300\/e\/tool-searchmcp-tool-host-request-adds-extra-tools","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.300","markdown":"### Sessions with a tool host interface send Claude extra tools\n\nWhen a session uses a tool host interface, Claude Code now adds an extra set of tools to the list sent to Claude\n\n**Unclear.** Which tools are added, and what decides whether they are added, is not stated.\n\n**What**\n\nTools are the actions Claude can take, such as reading files or running commands. When a session uses a tool host interface, Claude Code now adds an extra set of tools to the list it sends to Claude. Before, it sent only the tool host interface itself.\n\n**Why**\n\nIn these sessions Claude can see, and so use, more tools than before.\n\n- Area: Tool Host\n- Tier: Under the hood\n- Useful: 2\/5\n- Signal: 4\/5\n- Scope: individual\n- Heads-up: no"}