x402 watch — edit delivery URLs / sensitivity / events (free)

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

Despite no annotations, the description discloses key behaviors: bearer authentication, connection testing for new URLs, atomicity (unchanged config on failure), full-replace semantics, and return of updated watch view. Missing some edge-case error behavior, but adequate.

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 three sentences, front-loaded with the main action, and every sentence adds essential information without redundancy.

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 output schema, the description mentions returns the updated watch view, which is sufficient. It covers the main functional aspects, though error handling details are omitted. Overall, complete for a mutation 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%, so baseline is 3. The description adds value by explaining connection testing and full-replace behavior, which goes beyond the schema's parameter descriptions.

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's purpose: 'Edit an active watch: change webhook/Slack URLs, liveness sensitivity, or subscribed events.' It uses specific verbs and resources, and distinguishes itself from sibling tools like create, cancel, and renew.

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 provides clear context: requires a secret from x402_watch_create, and explains the full-replace behavior per channel. However, it does not explicitly exclude cases where this tool should not be used (e.g., for creating a new watch).

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