Equation 5 · Function Calling, MCP, and the Other Ways to Give a Model Tools
What does this equation mean?
Read the formula alongside the article passage below. Each part has a deeper page with its role in the equation, the supporting passage and nearby citations.
the number of distinct model-facing client applications. Read the equation part by part below; each part has a contextual explanation and a link to its mathematical background.
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How to interpret it
Read this expression with the definitions, units, and assumptions supplied by the article.
What the article says around this equation
This is an illustrative accounting, not a verified cost function — real integrations are not uniform in effort, and a bespoke connector written once is not literally rebuilt M separate times in practice. What the two expressions capture correctly is the shape of the argument both LSP and MCP’s own announcement make: the saving claimed is structural, in how many distinct things must exist and be maintained, not a claim that any single connector becomes individually cheaper to write [ 5 , 6 ] .
Sources cited in the article section
- [5] Introducing the Model Context Protocol ↗
- [6] Specification ↗
- [7] Server Features: Tools ↗
- [8] Authorization ↗
- [4] Tool use with Claude ↗
These citations give research context. Read each source to check which claims it supports.
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