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

The annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false, and openWorldHint=false, so the safety profile is covered. The description adds meaningful behavior beyond that: server-side vs browser delegation, transient processing with no storage/logging/retention, synthetic-input guidance, and AP2 artifact export with execution_hash. It does not contradict the annotations.

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 heavily front-loaded with OpenChainGraph compute-node boilerplate, a URL, and FV-status receipt details before the actual purpose summary appears. Several sentences do not help an agent select or invoke the tool, and the useful summary is truncated, making the structure inefficient.

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 complex eligibility-check tool with nested policy parameters and no output schema, the description does list the output fields and explains compute/privacy behavior. However, the core summary cuts off at 'independence-from...' and leaves the independence predicate only partially described, so important decision semantics are 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?

Schema description coverage is 100%, so the schema already documents the parameters, including compute and the nested policy_parameters object with its required keys. The description adds some semantic context by mentioning policy-supplied permitted-routes-per-architecture-type and required certification sets, but the summary is truncated and does not fully explain the independence inputs.

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 names a specific verb and resource: it 'Checks eligibility of a Swift CSCF Independent Assessment Framework assessment' and summarizes route/certification/independence checks. It is clear enough to distinguish this from generic assessment tools, though it does not explicitly differentiate from other independence-related siblings and the summary is truncated mid-sentence.

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 explains compute modes ('auto', 'browser', 'server') and says to use synthetic or anonymised inputs, but it does not say when to use this tool versus alternatives such as other assessor-independence or eligibility checks. There is no explicit when-to-use or when-not-to-use guidance for tool selection.

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