Unverified50% confidenceFactExact time
The MCP tool-calling chain has five steps in total: list, select, approve, call, answer.
1
Sources
50%
Confidence
Long-term
Relevance
10/21/2026
First Seen
Sources
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Related Claims
UnverifiedThe complete chain of an MCP tool call is: user message → Claude returns a tool use response → Host calls the function → Server returns the result → Host passes the result back as a tool result → Claude generates the final answer based on the result.76% similarVerifiedIn MCP, tool discovery is completed through the tools/list interface, and tool invocation is completed through the tools/call interface.76% similarUnverified四者的递进关系为：用MCP协议装好工具，通过Function Calling精准执行，最后封装成Skill持续提效73% similarVerifiedMCP addresses the connectivity problem (how a model reaches tools), while Skill addresses the usage problem (when and with what strategy the model combines tools).73% similarUnverifiedMCP tool definitions are billed in every round of conversation, regardless of whether a tool is actually called in that round.72% similar
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