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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is fully covered without the description. "No operational access" restates the read-only nature rather than adding new behavior detail such as freshness, scope of the limits, or whether results are static. Modest added value over annotations.

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 short sentences with no padding and the read scope front-loaded. The closing fragment "No operational access" is terse to the point of slight ambiguity, but it is not wasted words.

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-param, annotation-rich tool with no output schema, the definition is minimally sufficient but leaves gaps: it does not say what form the limits take or how they relate to the other acorn tools. A sentence on what an agent should do with the result would round it out.

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?

The tool takes zero parameters, so the baseline is 4 and there is nothing for the description to disambiguate. The empty schema with additionalProperties=false is self-explanatory.

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?

"Read public capabilities, safety and checkout limits" names a verb and a rough subject area, so the agent knows this is an informational read. But "capabilities" and "limits" are vague, and nothing distinguishes it from informational siblings like acorn_buyer_guide or acorn_public_catalog. The title's phrasing ("commercial limitations") is more specific than the description itself.

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?

There is no when-to-use guidance and no alternative is named, despite eleven sibling tools in the acorn family. "No operational access" hints that this is not the tool for performing purchases, but the agent must infer that rather than being told when to prefer acorn_buyer_guide or acorn_find_offers instead.

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