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

Annotations already declare destructiveHint=true and idempotentHint=false. The description adds useful context about the authenticated account lane, the Registry v2 matcher, and the typed executor, plus the ':free' variant condition. However, it does not elaborate on destructive effects, failure behavior, or rate limits, so it provides only modest added transparency.

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?

Two sentences, front-loaded with the core purpose, no filler or repetition. Every clause adds information about the execution lane, matcher, executor, or free-variant condition.

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?

For a destructive, 6-parameter tool with two undocumented parameters, the description is too sparse. It does not mention side effects, idempotency expectations, how to discover the free variant via sibling tools, or when not to use this tool. The output schema helps with return values but does not fill these invocation-semantics gaps.

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?

Schema description coverage is only 50%; request_id and idempotency_key have no schema descriptions. The tool description adds no parameter-level meaning beyond 'exact GET or POST path' and the ':free' append rule, leaving those two parameters unexplained and failing to compensate for the coverage gap.

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 opens with a specific action and resource: 'Execute one exact GET or POST path through the authenticated PubFi account lane.' It clearly distinguishes this from the sibling capability-list/get tools by focusing on route execution rather than capability discovery.

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?

It provides clear context about when this tool is appropriate—when an exact path must be executed through the same matcher/executor as the HTTP gateway—and adds a conditional rule: append ':free' only when the capability catalog publishes that variant. It does not explicitly name alternatives or exclusions, so it stops short of a 5.

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