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

Annotations already establish readOnly=true and openWorld=false; the description adds valuable computation and staleness context, including after-fee offer prices, floor comparison, recent-pace sell time, and a 10-minute refresh cap. It does not contradict the annotations, but it could be clearer about the owner/link scope.

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 compact and front-loads the main output before the refresh note. However, the first sentence is dense and the phrase 'NFTs would pay' is awkward, slightly reducing readability.

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 zero-parameter, read-only analytics tool with no output schema, the description adequately covers the main outputs and freshness. It leaves some ambiguity around 'link owner' and does not differentiate from adjacent portfolio tools, so it is not fully complete.

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?

There are zero input parameters, so there is nothing for the description to document beyond the schema. The baseline for a no-parameter tool is 4.

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 analytic operation: estimating proceeds from selling the owner's NFTs into current collection offers, alongside floor value and time-to-sell. The intended output is distinguishable from generic portfolio tools, though it does not explicitly name which sibling to use instead.

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?

Provides no explicit when-to-use guidance, prerequisites, or alternatives such as my_portfolio or my_offers. The only contextual cue is the refresh cadence, which is a freshness constraint rather than usage direction.

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