hello_aigent_subscribe

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

No annotations provided, so description carries full burden. It discloses that subscribing is a consent decision, fetches a file, and persists a token locally. Missing details on idempotency, error conditions, or side effects beyond subscription.

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?

Two sentences plus a warning. No redundant information. Every sentence 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?

Despite no output schema, description mentions return value (stored subscription, token not shown). Explains process and consent requirement. Could mention possibility of updating an existing subscription, but otherwise comprehensive.

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%, baseline 3. Description adds value by clarifying defaults (feed_id defaults to first/only feed), explaining principal as account/user, and describing consent_scope as what principal consents to receive.

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 tool subscribes to a Hello Aigent feed and explains the process (fetches discovery file, picks feed, subscribes). It distinguishes from siblings like fetch, list_subscriptions, and unsubscribe.

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?

Explicitly warns about consent decision ('confirm with your principal'). Provides context on how the tool works and mentions the discovery file URL. Could be more explicit about when not to use, but the consent note is strong guidance.

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