Refresh Newsletter

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

The description discloses the read nature (re-fetch) and source (WhatsApp), but given no annotations, it lacks details on side effects (e.g., rate limits, overwriting local data) or idempotency. It provides basic transparency but not exhaustive.

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, front-loaded with the main action, and contains no redundant information. Every word adds value.

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 description explains what the tool does but does not specify the return value or effect (e.g., whether it returns the metadata or just refreshes). Given no output schema, more detail would help. However, the tool is simple with one parameter, so it is minimally adequate.

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% with the 'id' parameter already described as 'the unique identifier'. The description adds no additional meaning or context beyond the schema, so baseline score of 3 is appropriate.

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 (re-fetch metadata), the specific resource (WhatsApp Channel newsletter), and the exact data fields (name, description, subscriber count). It distinguishes well from siblings like 'get_newsletter' and 'sync_newsletters'.

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 implies use for fresh data by specifying 'from WhatsApp', but does not explicitly state when to use this versus alternatives like 'get_newsletter' or 'sync_newsletters'. No mention of when not to use or prerequisites.

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