Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations are provided, so the full behavioral burden falls on the description. It says 'deterministic' but doesn't explain what that means in practice (e.g., same output for same input) or describe return format, limits, or performance characteristics.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

A single short sentence, but it front-loads a vague runtime qualifier ('first-run MCP execution') instead of practical details like output length or supported input. Minimal but wastes the one chance to inform.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

No output schema, no annotations, and the description covers only a bare verb. It omits expected output form, determinism guarantees, and any limits. For a summarization tool, much more is needed for correct invocation.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Only one parameter ('text'), and the schema already includes a description ('Plain text to summarize.'). With 100% schema coverage, the description adds little, but the baseline for zero undocumented params is 4.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

States a specific verb (summarize) and resource (text), but the phrase 'for first-run MCP execution' adds a runtime detail rather than scope. It doesn't distinguish from siblings like 'catalog' or 'reply.draft', leaving purpose only partly clarified.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance on when to use this tool versus alternatives or under what conditions (text length, language, etc.). The single sibling names don't help either. The agent must infer usage entirely.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.