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Definition
In MCP, an agent discovers tools with tools/list and runs one with tools/call, passing the tool name and an arguments object matching the tool's input schema. The result (or a JSON-RPC error like -32602 for bad params) comes back in the response.
In plain terms
The command that says 'run this tool with these inputs'.
Why it matters here
It is the workhorse call against the MCP server. See get_quote and the JSON-RPC recipe.
Related reading
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