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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, covering the safety profile. The description adds value beyond that by disclosing the live snapshotPolicy behavior ('returns the versioned live snapshotPolicy when cached tool descriptions differ') and the set of metrics it reports. It does not elaborate on error conditions or the exact format, but the annotations and output schema mitigate that gap.

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 two sentences, with the primary purpose and scope front-loaded in the first sentence, and the key usage instruction in the second. There is no filler; every clause conveys necessary information about capabilities, the snapshotPolicy feature, and the recommended call timing.

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 zero-parameter status check with an output schema present, the description covers the essential context: what is being checked, why it is useful (fail-fast), and the special snapshotPolicy behavior. The output schema presumably documents the return structure, so the description does not need to duplicate that. Nothing an agent needs to decide to call this 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 tool has zero parameters, so schema coverage is trivially 100% and there is nothing for the description to explain. The description focuses on what the tool reports rather than inputs, which is appropriate. The baseline for a 0-parameter tool is 4, and no deduction is warranted since the description adds no parameter-related noise.

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 clear verb ('Check') and a specific resource ('what the account can do right now'), then enumerates the concrete things it reports: Blender execution availability, compute budget usage, open job counts, deployment policy limits, and the versioned snapshotPolicy. This makes it unambiguous and distinct from the many sibling tools that target specific resources (e.g., job_get, deployment_policy_update).

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 gives an explicit when-to-use instruction: 'Call before queueing work to fail fast.' This tells the agent the precise scenario for invoking the tool and implies it should be used as a preflight check. While it does not name alternatives, its role is unique among siblings, and the directive is actionable and clear.

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