Tool Count Appropriateness

level

server coherence

weight

one quarter of the coherence score

key

tool_count_appropriateness

Is the number of tools appropriate for the server's purpose? An agent sees every tool at once, so a surface that is too wide costs context and selection accuracy, and one that is too thin leaves tasks it cannot complete.

5

well-scoped, each tool earns its place (typically 3-15 tools)

4

slightly over or under but reasonable

3

borderline (1-2 tools feels thin, 16-25 feels heavy)

2

too many (26+) or too few (1) for the apparent scope

1

extreme mismatch (50+ tools, or a single trivial tool)

• Each tool should earn its place. Fold variants that differ only by a parameter into one tool with an enum.
• A server with dozens of tools costs every agent context before it has done any work; a single trivial tool is not a server.

The normative text is the specification; this page restates it. All dimensions: dimensions.