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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false, and openWorldHint=false, so the safety profile is fully covered by structured data. The description's remaining behavioral content is a list of returned fields, which largely duplicates the output schema, and it says nothing about what happens with a missing or invalid id.

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 front-loaded sentence that leads with the verb and resource before the field enumeration. The long comma-separated field list is dense and partially redundant with the output schema, but nothing is padded or off-topic.

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 one-parameter read lookup with full annotation coverage and an output schema, the description supplies everything needed to select and invoke it correctly. The only gap is error/not-found behavior, which is minor given the structured fields already present.

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 100% and the single id parameter is already documented in the schema as 'as returned by search_profitdrawer'. The description repeats the same provenance hint ('Ids come from search_profitdrawer') without adding format or constraint detail, so baseline 3 applies.

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 ('Returns one answer published by ProfitDrawer by id') and enumerates the payload contents, making clear this is a single-record fetch rather than a search. The contrast with the sibling search_profitdrawer is implicit but unmistakable from 'one answer ... by id' and 'Ids come from search_profitdrawer'.

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?

It establishes the usage context clearly: use this after search_profitdrawer to resolve a specific id into a full answer. It does not state any when-not conditions or error behavior for unknown ids, but for a simple lookup tool the sequencing guidance is sufficient.

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