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

No annotations are provided and the description lacks any indication of side effects, idempotency, authentication, or error behavior. The only mention is 'Billing per call: 1 Credits,' which is vague and does not clarify the tool's actual behavior.

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 extremely short, but its brevity comes at the cost of information. It is concise in word count but fails to convey any meaningful detail, making it ineffective.

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?

The tool definition provides no information about return values, output schema, or example usage. The lack of annotations and output details combined with a sparse description leaves the tool largely undefined.

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 sole parameter 'query' is described as 'Search query', which gives some minimal semantic meaning, but it lacks details such as expected format, length, or examples. The description is too generic to be helpful.

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 only says 'Autocomplete' without specifying what is being autocompleted. The tool name and the 'query' parameter imply it might be for search suggestions, but this is not made explicit in the description.

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?

There is no guidance on when to use this tool versus any alternatives. The description does not mention any use case, prerequisites, or scenarios where autocomplete is appropriate.

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