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

Annotations already indicate this is not read-only or idempotent, and the description adds the key behavioral detail that running the job triggers delivery to all added users. However, it does not disclose potential consequences, such as repeated runs causing duplicate deliveries, beyond what the annotations imply.

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 a single clear sentence with no filler. The core action and its effect are front-loaded and every word contributes meaning.

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 tool with one parameter and a clear side effect, the description covers the essential information needed to call it correctly. It could add a note about idempotency or what happens if the job has already run, but the current description is sufficient for basic correct use.

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 single parameter job_id is fully described in the schema as 'The bulk job ID to run', and the description adds no additional parameter context. With 100% schema coverage, the baseline of 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 ('Run') and resource ('bulk job') and clarifies the consequence ('triggering delivery to all added users'). This distinguishes it from related tools like create_bulk_job and get_bulk_job.

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 phrase 'triggering delivery to all added users' implies this tool is used after users have been added to a bulk job, but it does not explicitly state when to use it versus alternatives or provide exclusions. Usage context is present but left to inference.

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