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

Annotations only declare the generic safety profile (readOnlyHint=false, destructiveHint=false, openWorldHint=true). The description adds real behavioral context beyond that: no notification is sent to the client, so no confirmation is needed, and an API key with app access is required. It omits failure modes and uniqueness/validation behavior for the service name.

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?

It is front-loaded with purpose, but the first two sentences substantially overlap ('One-time or repeating job...' vs 'a job on the calendar... one time or repeating weekly, every other week or monthly'), which wastes space. The remaining sentences each carry distinct 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?

For a 7-parameter mutation tool with no output schema, the description covers side effects, the API-key requirement, and the reschedule alternative, which is enough for correct invocation. It could say more about what happens when the service name does not match or whether the job is immediately visible on the calendar.

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 100%, so the schema already documents all seven parameters including the recurrence enum and required fields. The description only restates the service-name-match requirement already present in the schema, adding no new semantics. Baseline 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 states a specific verb and resource: creating a calendar job for a client, one-time or recurring, optionally assigned to a crew. It is unambiguous about what the tool does, though sibling differentiation is limited to the reschedule_job pointer rather than fully contrasting with the other create_job tools in the catalog.

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?

It gives clear context for use: 'it runs without asking first' because nothing is sent to the client, and explicitly routes to reschedule_job when a date is wrong. It does not state prerequisites or when-not-to-use beyond the reschedule case, so it stops short of the top score.

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