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

Annotations already declare readOnlyHint=false, destructiveHint=true, and openWorldHint=true, so the write/open-world profile is covered. The description adds the useful fact that the account is created in a 'pending' state and that a password is a backend prerequisite, but it does not say whether re-invocation duplicates an account, what happens on failure, or how it affects an existing signup.

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, front-loaded with the action and its position in the flow, with the password caveat placed where it is needed. No filler, though the second sentence is doing parameter work that belongs elsewhere.

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 12-parameter mutating tool with 25% schema coverage and no output schema, the description covers only the action and one required input. It does not describe the resulting account state, identifiers an agent would need downstream, or the meaning of the untracked parameters, leaving substantial gaps.

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?

Only 25% of the 12 parameters carry schema descriptions, so the description is expected to compensate, yet it only reinforces the password requirement already stated in the schema and mentions no semantics for domain, email, name fields, monthlyPageviews, or the UTM/mixpanel tracking fields.

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 ('create the pending Sulvo user/account') and situates it as step 2 of the normal signup flow. This distinguishes it from start_sulvo_signup (step 1) and submit_sulvo_signup_documents without needing the schema, though it never names those siblings 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?

'Run normal Sulvo signup step 2' implies the position in the flow and notes the account must exist before ads.txt and review steps. However, no alternative is named and no when-not condition (e.g. resuming versus restarting a signup) is given, so routing is inferred rather than stated.

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