capabilities_summary

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

No annotations are provided, so the description carries the transparency burden. The verb 'Summarize' strongly signals a read-only informational operation, and the zero-parameter schema reinforces that no state changes are involved. It does not explicitly state side-effect freedom or auth requirements, but for a no-param meta-summary tool this is adequately transparent.

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?

The description is a single, front-loaded sentence with no filler. It conveys the tool's purpose and distinctive value in a compact form.

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?

Given the tool's simplicity (zero parameters, output schema provided, no complex behavior), the description fully covers what the agent needs to know. It succinctly explains both the subject matter (tools exposed) and the specific angle (write-safety model).

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?

The parameter schema is empty, so there are no parameter semantics to explain. The baseline of 4 applies since no parameters exist and the description does not need to compensate for undocumented inputs.

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?

The description clearly identifies the tool's purpose: summarizing the exposed tools and their write-safety model. This is a specific verb-resource pairing that distinguishes it from sibling tools, which are individual data operations.

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?

The description implies usage context: when an agent needs an overview of the MCP server's capabilities and safety classification. It does not explicitly mention alternatives or exclusions, but no competing summary tool exists among siblings, so the context is clear.

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