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

Annotations already declare readOnlyHint=true, openWorldHint=true, destructiveHint=false, so safety profile is covered. The description adds the meaningful behavioral trait that it returns only first-time claimers (a filtering behavior) and the return fields. It doesn't describe pagination or ordering beyond limit, which is a modest gap for a read tool.

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 dense sentences with the core scope front-loaded ('First-ever...claims in a time window: a cash-out signal') followed by returns and sibling routing. No filler, though slightly crowded into one long second sentence.

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 simple two-param read-only list tool with no output schema, the description covers purpose, returns, and alternative routing. Minor gap: limit behavior (max 50, default 20) is left entirely to the schema, and ordering/pagination isn't discussed, but overall it's adequate.

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 coverage is 50%; limit has no description in the schema, but the description implies a count cap ('across all coins' and returns a list) though doesn't explain limit semantics explicitly. sinceMinutes is documented in schema as the lookback window, and description reinforces 'in a time window'. Baseline 3 given partial schema coverage and only marginal added param meaning.

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+resource+scope: 'First-ever pump.fun creator fee claims in a time window' and describes the returned fields (creator wallet, mint, lamports, timestamp). It clearly distinguishes itself from pumpfun_list_claims by naming it.

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?

Gives a strong positive use case ('spot creators cashing out for the first time across all coins') and an explicit alternative routing ('for one creator's history call pumpfun_list_claims'). No explicit when-not-to-use negative conditions, but the alternative selection is clear.

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