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

Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=true, so the safety profile is covered. The description adds that this is a GET /users call returning a defined set of user fields, but says nothing about pagination behavior or result ordering beyond what the schema implies.

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?

A single compact sentence with the resource and returned fields front-loaded; the trailing 'GET /users' is mildly redundant but harmless. No wasted clauses.

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 read-only list tool with annotations covering safety, a fully described schema, and no output schema, the description is nearly sufficient — it discloses the field set returned. Only the pagination/alternative-tool guidance 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% with two fully documented parameters (limit 1-100 default 20, offset with next_offset chaining), so the schema carries the load. The description adds no parameter meaning beyond the endpoint reference.

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 and resource ('List the account's organizer and sub-organizer users') and even enumerates the returned fields (name, company, contact details, time zone, user type), which pins down scope precisely. It does not explicitly distinguish itself from the singular sibling eventzilla_get_user, so it falls short of the 5 bar.

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 exclusions, and never mentions the alternative eventzilla_get_user for fetching a single user. The use case (listing all account users) is only implied by the word 'List'.

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