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

Annotations already declare this is non-read-only, destructive, non-idempotent, and open-world. The description adds some useful context beyond that with "two-step" and the owner opt-in requirement, but it does not explain what the destructive aspect means, what happens on duplicate entries, or how confirm_token is obtained.

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?

It is short, and the verb is front-loaded, but the parenthetical is syntactically awkward and obscures the intended workflow. The content is concise without being clear, so structure is only marginally adequate.

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?

This is a six-parameter mutation tool with a nested values object, a required confirm_token flow, and destructive behavior. Even with an output schema present, the description does not provide enough operational context to call it safely and correctly.

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% across 6 parameters, so the description must carry parameter meaning. It only vaguely gestures at values and group sharing; it says nothing about site, list, member, or confirm_token, leaving most required inputs unexplained.

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 says it "Adds an entry for a user," which gives a verb and a rough target, but it never clearly states that this entry goes into a list/app row or how that differs from siblings like add_list_items. The parenthetical "to read (values; group shares it with the group, two-step)" muddies rather than sharpens the purpose.

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 phrase "two-step" hints at a confirmation flow, but there is no explicit when-to-use guidance, no exclusion against add_list_items or update_app_rows, and no stated prerequisites beyond the vague "Needs the owner's opt-in." An agent would have to infer when this tool is the right choice.

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