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

Annotations already declare readOnlyHint=true, and the description's "DoorLoop API: GET /accounts" merely restates that this is a read. It adds no behavioral context beyond the annotation — nothing about pagination behavior, ordering defaults, or result shape. With annotations covering the safety profile, a 3 is appropriate.

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, zero filler, with the resource identified first and the API mapping second. Front-loaded and easy to parse, though the endpoint clause carries marginal value for an agent that only needs to call the tool.

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 simple read-only list tool with full schema coverage and a readOnly hint, the definition is minimally sufficient. However, with no output schema, the description says nothing about what a returned account looks like or how results are paginated, leaving the agent to discover the response shape empirically.

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% with all six optional parameters documented inline (type, sort_by, page_size, page_number, leaseChargeItem, sort_descending). The description adds no parameter meaning beyond the schema, 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?

Names a specific verb and resource ("List chart-of-accounts entries"), and the phrase "chart-of-accounts" usefully disambiguates from siblings like doorloop_list_users or doorloop_list_owners that also deal with "accounts"-adjacent concepts. Clear enough to act on, though no sibling is named explicitly.

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 no when-to-use guidance, no prerequisites, and no exclusions or alternatives. The only hint is the bare endpoint reference, leaving selection between this and the many other list_* siblings entirely to inference.

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