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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=false, so safety is covered. The description adds genuine behavioral value by disclosing what the call returns (route params plus per-field validation rules), which matters because there is no output schema to explain the response shape.

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 tight sentences: the first states what is returned, the second states when to call it. Nothing is padded and the payload (fields and validation rules) is front-loaded.

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 two-parameter read-only introspection tool with full schema coverage, the definition covers purpose, timing and return content. With no output schema present, the description's explanation of returned validation rules fills the only real gap.

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 coverage is 100% and both parameters are fully documented there, including the enum of HTTP methods and the path example. The description adds only a light restatement ('route parameters'), so the schema is doing the heavy lifting and the baseline of 3 applies.

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 and resource: shows what one Trainer Connect operation accepts, enumerating route parameters and per-field validation rules (required, type, allowed values). This clearly separates it from list_operations (which enumerates operations) and from api_read/api_write (which execute them).

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?

Explicitly says when to use it — 'before api_write so the request is right the first time' — which names a sibling alternative and the condition selecting this tool. It stops short of stating when not to bother (e.g. trivial GETs), so it is clear context rather than full when/when-not guidance.

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