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

No annotations are supplied, so the description carries the full burden, yet it discloses nothing about permissions required to read a signing secret, whether the value is returned in plaintext or masked, or what happens if no webhook is configured. The only behavioral hint is that the return value is a secret, which is implied by the resource name itself.

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 front-loaded sentence with no filler; the scope qualifiers (product, fulfillment webhook, signing) all earn their place.

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?

Low-complexity tool: one required parameter and no output schema, so the description need not explain return formatting. However, for a tool that hands back a credential, the absence of any note on authorization or secret handling leaves a meaningful 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 description coverage is 0% and the single product_id parameter is undocumented. The phrase "the product's" loosely ties product_id to a product identifier, but adds no format, sourcing, or requirement detail to compensate for the schema 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?

Specific verb (Return) plus a precisely scoped resource (the product's fulfillment webhook signing secret). An agent can distinguish this read-style retrieval from the sibling rotate_webhook_secret by the verb alone, though the description never names that sibling explicitly.

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 when-to-use guidance, no preconditions, and no mention of alternatives such as rotate_webhook_secret or get_product. The agent must infer usage entirely from the name and resource.

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