update_checklist

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It does mention the need for THINGS_AUTH_TOKEN, which is useful, but it never describes side effects, idempotency, or that the operation likely replaces the entire checklist via the default 'replace' mode. The behavior is largely opaque.

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, so it is not verbose, but it is not appropriately sized because it omits critical information. The phrase 'documented URL scheme' is vague and adds little value, while the auth requirement could be placed elsewhere. It is under-specified rather than efficiently concise.

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 three parameters, no annotations, and an output schema, this description is far too sparse. It fails to explain how to form the checklist_items, what the mode parameter does, what the output schema contains, or any behavioral expectations. An agent has almost no guidance for correct invocation.

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 description coverage is 0%, so the description must compensate by explaining the parameters. It does not mention id, mode, or checklist_items at all, nor clarify the meaning of the 'mode' default or the array structure. The agent receives no additional semantic information beyond what the schema types alone convey.

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 states a verb ('change') and a resource ('checklist'), so the basic purpose is clear. However, it does not explain what 'change' entails (add, remove, reorder, replace?) and does not distinguish it from sibling tools like update_todo, making the exact scope ambiguous.

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 given on when to use this tool versus alternatives. It mentions a 'documented URL scheme' and an auth token, but these are implementation details, not usage context. There is no indication of prerequisites beyond the token or situations where another tool would be more appropriate.

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