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

There are no annotations, so the description carries the full burden of disclosing side effects, permissions, or idempotency behavior. It only says 'Create' and gives no information about mutability, duplicates, return values, or required access, which is a significant gap for a create tool.

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 description is a single short sentence with no wasted words, but it under-specifies the tool's behavior and available parameters. It is concise rather than informative, falling between adequate and under-specified.

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 tool with no annotations and no output schema, one vague sentence is insufficient. The description does not explain the operating context, the meaning of the optional 'days' parameter, or what a successful creation returns, leaving important gaps for an AI agent.

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 input schema has one parameter, 'days', with an empty description (0% schema coverage), and the tool description never mentions it or explains what the number means. The agent cannot determine how to set this parameter from any provided text.

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 uses a direct action verb and identifies a specific resource type ('idempotency/replay firewall'), which distinguishes it from the many other create_* siblings. However, it offers no elaboration on what this firewall actually does, so it stops short of being fully self-explanatory.

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 guidance is provided about when to use this tool versus the numerous create_* siblings, nor any exclusions or prerequisites. The description only names the resource and leaves usage entirely to inference.

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