contacts_delete

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

With no annotations, the description conveys the destructive nature ('permanently') and mandatory confirmation. It does not detail side effects, authentication needs, or rate limits, but for a simple delete, these details are minimally necessary.

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 sentence that is concise and front-loaded with the action. It could be more structured, but it effectively communicates the core functionality without unnecessary words.

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 simple deletion tool with two parameters and no output schema, the description covers the essential behavior. However, it does not mention return values or error handling, which could be helpful for an agent deciding to invoke the tool.

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 coverage is 100%, and the description does not add new semantics beyond the schema's descriptions of 'id' and 'confirmed'. The description's mention of confirmation aligns with the schema but does not enhance it.

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 clearly states the action is to delete a contact permanently, with a requirement for confirmation. It distinguishes from sibling tools like contacts_create or contacts_update.

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?

The description explicitly states that the user must confirm, which is a usage guideline. However, it does not provide explicit instructions on when to use this tool versus alternatives, though the permanence and confirmation requirement imply careful use.

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