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

Annotations already declare readOnlyHint, idempotentHint, non-destructive and closed-world, so the safety profile is fully covered without the description. The description adds only the optional-initial-buy nuance; it never says what the estimate includes (gas, rent, platform fees) or what currency the result is denominated in.

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 sentence that front-loads the verb and resource and appends the only qualifier that matters. Nothing is wasted and nothing is buried.

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 two-parameter, annotation-covered read-only estimator this is adequate, but with no output schema the description should say what the returned figure represents (total cost breakdown, currency, whether it varies by chain). That omission leaves an agent guessing at the shape of the result.

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 50%: initial_buy is documented ('Optional initial buy in SOL or ETH'), while chain relies on a self-explanatory enum. The description restates the optionality of initial_buy and names the two chains, but adds no format or unit details beyond the schema, so it neither compensates for the gap nor is penalized for it.

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 (estimate), resource (total launch cost), and scope (Solana or Robinhood Chain, optional initial buy), so the agent knows exactly what is computed. It does not, however, distinguish itself from siblings compare_launch_platforms or plan_token_launch, leaving the agent to infer the division of labor.

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?

Usage is implied rather than stated: the 'including an optional initial buy' phrasing hints this is a pre-launch cost check, but there is no explicit when-to-use or when-not-to-use guidance and no mention of the sibling tools. An agent could reasonably confuse this with compare_launch_platforms.

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