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

The readOnlyHint annotation already establishes that the tool is safe. The description adds some scope context ('canonical Knowledge Atlas and related history') and a free-to-use signal, but does not mention pagination, ranking, or result behavior. It does not contradict the annotation.

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?

The core sentence is concise and front-loaded, but the leading 'FREE.' is unrelated filler that does not help an agent invoke the tool. The structure is acceptable but could use a richer explanation.

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 read-only search with two simple parameters, the description is minimal but leaves gaps: it does not explain what the Knowledge Atlas contains, how results are returned, or when to use this tool relative to the seven siblings. The annotations cover safety, but the description lacks enough context for confident selection.

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 schema documents query and limit with types, defaults, and bounds, but the description provides no additional meaning about how to form the query or how limit affects results. With 0% schema description coverage, the description should compensate; it does not.

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?

The description identifies the tool as a search operation over a specific resource ('California Bitcoin’s canonical Knowledge Atlas and related history'), which is more specific than the title. It clearly conveys the verb and resource, distinguishing it from answer/verify tools, though it does not explicitly differentiate from sibling search-like tools.

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 guidance on when to prefer this search tool over siblings such as get_bitcoin_topic or batch_bitcoin_research. The description only states what the tool does, not the conditions that would select it.

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