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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false, and openWorldHint=false, so the safety profile is covered. The description adds only a pointer to describe_operation for schemas; it says nothing about what a 'validate period' contains, error behavior for bad IDs, or auth needs.

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 same endpoint sentence appears twice back-to-back, which is pure waste, and the operation ID hash adds no decision-relevant information for an agent. There is no front-loaded statement of what the tool returns or does.

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?

With two parameters (one nested-object query bag), no output schema, and zero schema descriptions, the description needed to carry real weight and instead offers only a REST path and a pointer to describe_operation. An agent would be guessing about the response shape and the meaning of `query`.

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 0% for the two parameters (required `id` and optional `query`), so the description has to compensate and does not. The `describe_operation` pointer is a faint mitigation, but neither `id`'s format/constraints nor `query`'s free-form purpose is explained.

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 restates the tool title verbatim twice ('GET /api/validate/period/:id') rather than explaining in plain language what validation artifact is retrieved. An agent can infer it looks up a validation period by ID, but this is essentially the name repeated, not a stated purpose.

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 only guidance is that 'describe_operation provides native request schemas', which points to a sibling for schema lookup but says nothing about when to call this tool versus alternatives like validate lease or describe_operation. No exclusions, no preconditions.

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