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

Annotations already establish read-only, idempotent, non-destructive behavior, and the description aligns by saying 'Return'. It adds useful context that the result is a projection rather than the raw job payload, but it does not describe not-found behavior, latency, or the concrete shape of the projection. This is adequate but not rich.

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?

A single, front-loaded sentence with no filler. Every phrase earns its place and the key qualifiers ('MCP task-compatible', 'status projection', 'durable', 'one') are packed in without unnecessary elaboration.

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 low-complexity getter with full schema coverage and safety annotations, the description is mostly sufficient. However, with no output schema, it leaves the concrete fields of the 'status projection' unspecified, and the missing sibling differentiation weakens an agent's ability to confidently select it. Slightly more detail on the returned projection or a pointer to the job-status sibling would make it complete.

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% and both parameters have descriptions (taskId is the durable jobId; includeJob adds the raw payload), so the description does not need to add parameter detail. It reinforces 'durable ATA research job' but adds no meaning beyond the schema, so 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 uses a specific verb ('Return') and names a precise resource ('MCP task-compatible status projection') scoped to a single durable ATA research job. It is not a tautology, but it does not explicitly contrast with sibling ata_get_research_job_status, so the agent must infer the difference from the 'projection' wording.

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 'MCP task-compatible status projection' implies this tool is for obtaining an MCP-compatible status view, and the one-job scoping implies a single taskId. However, it gives no explicit when-not-to-use guidance or alternative routing relative to ata_get_research_job_status or ata_get_research_task_result, leaving selection partly to inference.

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