newsletter_follow

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

With no annotations, the description carries full responsibility for behavioral disclosure. It does note that confirm must be true, which is a useful behavioral signal, but it does not explain side effects, whether following is reversible without newsletter_unfollow, expected errors, or what happens if confirm is false. This is thin for a tool that creates a subscription relationship.

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 two short sentences with no filler. The action is front-loaded and the critical parameter requirement is stated immediately after. Every word earns its place.

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 annotations, no output schema, 0% schema description coverage, and only two parameters, the description is not rich enough for an agent to invoke the tool with full confidence. It omits the meaning of jid, behavioral outcomes, and failure/error considerations, which are important for a state-changing follow operation.

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 for both parameters. It adds meaning for 'confirm' by explicitly requiring true, but it leaves 'jid' completely unexplained—its format, semantics, or relationship to a channel are not addressed. The description only partially compensates for the lack of schema-level parameter documentation.

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 and resource: 'Follow a channel.' This is specific and distinct from sibling tools like newsletter_unfollow or newsletter_mute, though it does not explicitly name the alternative. The action verb is concrete and not a restatement of the tool name.

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 only usage guidance is the parameter requirement 'Requires confirm=true,' which is a precondition for calling the tool, not guidance on when to choose this tool over alternatives. The description does not mention when to use newsletter_follow versus related tools or any exclusions, leaving routing to inference.

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