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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and openWorldHint=false, so safety is covered. The description adds genuinely useful context beyond that: the artifact is a PDF requiring a wet signature, and the signed copy must be returned via upload_signed_transfer_poa. It does not say how the PDF is delivered (URL vs. binary), which keeps it off a 5.

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?

Two short sentences with no filler; the output artifact and its purpose are front-loaded, followed by the required next action. Every clause carries information the agent needs.

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?

With no output schema, the description correctly identifies the return as a PDF and explains the follow-up upload step, which is enough to drive the workflow. It could be slightly more complete about how the PDF is delivered to the caller, but nothing essential to correct invocation 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?

Schema description coverage is 100% and the single leiId parameter is already well documented there, including its source (start_lei_transfer or list_my_leis) and the warning that it is not the 20-character LEI number. The description adds no parameter-level information, so the baseline of 3 applies.

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?

States a specific verb (returns/downloads), the exact resource (the transfer POA of an LEI being transferred), and the output form (PDF for hand-signing). This clearly separates it from the sibling get_transfer_poa_signing_link and from download_limited_poa without needing to open either schema.

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 names the downstream step explicitly — upload the signed copy with upload_signed_transfer_poa — which tells the agent where this fits in the transfer workflow. It gives no explicit exclusion or 'when not to use' guidance versus download_limited_poa, so it stops short of a 5.

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