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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false, and openWorldHint=true, so the safety profile is fully covered. The description adds the useful scope note that only 'public' profile data is returned, but says nothing beyond that about behavior, limits, or error conditions.

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?

One sentence, front-loaded with the verb and resource, with the field inventory appended compactly. Nothing is wasted and nothing redundant is repeated from the schema.

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?

With no output schema, the description helpfully enumerates the payload categories (token tiers, NFT collections, discount mode, verification status), which is exactly the kind of return-value context needed. An agent can call this correctly from the description plus annotations, though error or not-found behavior is unaddressed.

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 is a single parameter and schema description coverage is 100%, so the schema already documents the required 'id' with its pattern and length constraints. The description adds nothing about the identifier semantics, 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 ('Get') and resource ('merchant profile') and even enumerates the profile's contents (token tiers, NFT collections, discount mode, verification status). It does not, however, distinguish itself from the sibling insumer_list_merchants, so an agent must infer that this is the single-entity fetch vs. the collection listing.

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?

The description gives no when-to-use guidance, no mention of prerequisites, and no routing to alternatives such as insumer_list_merchants or insumer_check_discount. The agent only sees a one-line purpose statement with no selection criteria.

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