Watch a series (webhook on movement)

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

The description goes well beyond the readOnlyHint/idempotentHint annotations by disclosing authentication requirements, the https constraint, the trigger condition, and the webhook payload contents (new value, verification status, citation). This gives an agent meaningful operational context for a write operation.

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 concise and well-structured: it front-loads the core action, explains the behavior, lists requirements, and points to related tools—all in three focused sentences with no filler.

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 simple three-parameter creation tool with no output schema, the description covers purpose, trigger behavior, payload, authentication, protocol, and lifecycle management via siblings. Nothing essential for correctly invoking the tool is missing.

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?

The input schema already fully documents all three parameters with descriptions and examples. The description reinforces that webhookUrl must be https and clarifies what the webhook carries, but it does not add substantial parameter-level semantics beyond the schema. Baseline 3 applies given 100% schema description coverage.

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?

Description opens with 'Create a monitor' and states exactly what the tool does: a series.updated webhook fires to the user's URL when the store's refresh lands a new period or revised value. It also distinguishes itself from list_monitors and delete_monitor by mentioning management via those siblings.

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 clearly conveys the intended use case: monitor a series and receive webhook notifications on updates. It also states prerequisites (API key, https webhook) and points to list_monitors/delete_monitor for management. It does not explicitly discuss alternatives like polling or when not to use this tool, but the usage context is clear.

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