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

Annotations already establish readOnlyHint, idempotentHint, and closed-world behavior, so the safety profile is covered. The description adds two pieces beyond that: the required `analytics:read` scope and a prompt-injection warning that person-authored text arrives in untrusted_fields and must not be treated as instructions. It still omits what the analytics actually contain and what `refresh` triggers.

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 short sentences with no filler, and the security-critical untrusted_fields warning is stated plainly. The opening sentence is wasted on a name restatement instead of carrying the front-loaded payload, which keeps this from a 5.

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 tool with 3 undocumented parameters, no output schema, and no indication of what metrics are returned, the description is far too thin. The untrusted_fields note hints that returned content includes user-written text, but date semantics, refresh behavior, and the shape of the analytics are all absent.

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 0% for three parameters, and the description supplies no meaning for any of them. The expected format of date_start/date_end (ISO date, timestamp, timezone?) and the effect of `refresh` are left entirely undefined, so an agent must guess.

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?

"Get my analytics" simply restates the tool name and title without naming a single metric, dimension, or report type. Against siblings like get_account_billing, get_review_summary, and get_payout_summary, an agent cannot tell what data this returns or how it differs from those report tools.

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?

There is no when-to-use guidance, no exclusions, and no mention of the sibling report tools that could serve as alternatives. The only contextual statement is an authorization requirement, which is a precondition rather than usage guidance.

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