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

With no annotations, the description carries the full burden and does disclose meaningful behavior: the required platform session context, the exact role set that qualifies as 'staff', and the provenance of bootstrap owners (server config, not revocable via this surface). The last point usefully signals this tool is a read/list surface and that revocation lives elsewhere. It does not confirm read-only status or return shape, keeping it below 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?

Three compact sentences with no filler, and the access constraint is front-loaded. The most valuable fact (bootstrap owners cannot be revoked here) is placed last, where it is slightly buried, but overall the text is tight.

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 list tool with no output schema and no annotations, the description covers who appears in the result set, who may call it, and the one edge case (bootstrap owners from server config). Nothing essential to invoke it correctly is absent, though return fields and pagination remain unstated.

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 takes zero parameters, so there is nothing for the description to disambiguate; baseline 4 applies. No parameter-level information is required or missing.

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 resource and narrows it precisely: 'People with a platform role (owner, admin, support, finance).' That enumeration lets an agent distinguish this from members_list or platform_accounts_list without opening a schema. It never explicitly differentiates itself from those specific siblings, so it stops short of a 5.

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?

'Platform staff only (account session)' states an access prerequisite, which is useful context for whether the tool is callable. However, there is no guidance on when to prefer this over the many adjacent listing tools (platform_access_list, members_list, platform_accounts_list) and no stated exclusions.

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