build

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

No annotations provided, so description carries full burden. It does not disclose side effects, destructiveness, or return behavior. The phrase 'Build this filter' implies creation but no details on state changes or dependencies.

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 short but at the expense of clarity. It lacks essential details, making it under-specified rather than concise. Every word is used but does not convey useful guidance.

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?

Given no output schema, no annotations, and vague purpose, the description is completely inadequate. It fails to explain what the tool returns, when to use it, or how parameters affect behavior.

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 has two parameters (items and config) with 0% description coverage. The description does not explain what 'items' (array of strings) or 'config' (optional object) do. It adds no meaning beyond the schema.

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?

Description says 'Build this filter from an initial string dataset' but does not specify what kind of filter or how it relates to sibling tools. The verb 'build' and noun 'filter' are vague; no differentiation from siblings like 'contains' or 'insert'.

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 on when to use this tool versus siblings. The description does not mention prerequisites, limitations, or alternative tools. A good description would indicate if this is for initializing a filter before using other operations.

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