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

readOnlyHint=true in the annotations already establishes this is a safe, non-mutating read, so the bar is lower. The description adds only the underlying REST endpoint (GET /webhooks/), and says nothing about pagination, result volume, or auth scoping beyond 'for the project'.

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 short sentences, with the purpose front-loaded and the API reference trailing as supporting detail. Nothing is wasted.

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 zero-parameter, read-only list tool with no output schema, the description covers what an agent needs to select and call it. The only minor gap is not indicating whether the list is paginated or truncated.

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 tool takes zero parameters, so the schema baseline of 4 applies. There are no parameters that need semantic elaboration in the description.

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?

Names a specific verb ('List') and resource ('webhook subscriptions') with explicit scope ('configured for the project'). It is clear what the tool does, though it never references its write counterpart uploadcare_create_webhook, so sibling differentiation is left to inference.

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?

Usage is only implied by the read-only listing nature of the tool; there is no statement of when to use it versus uploadcare_create_webhook, nor any prerequisites or exclusion conditions. Adequate but leaves the agent to infer context.

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