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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is fully covered without description help. The description adds only topical scope (what content is indexed), not behavioral traits like result limits, ranking, or what happens with an empty/no-match query.

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 identifies the tool and its indexed domains with no filler. Nothing is redundant or buried.

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 one fully documented parameter, rich annotations, and an output schema handling return values, the definition is nearly sufficient. The one meaningful gap is the missing handoff to get_doc_page, which an agent would need to know to complete a search-then-read workflow.

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 query parameter already carries an example-driven description ("deploy ethereum node", "eth_call"). The tool description adds nothing beyond the schema about query syntax or formatting, so the 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 (search) and resource (Chainstack docs) and enumerates the content domains covered — RPC methods, node infrastructure, Web3 APIs, deployment guides, code examples. An agent can tell this is a documentation retrieval tool. However, it never distinguishes itself from the sibling get_doc_page, so the boundary between the two retrieval tools remains implicit.

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 explicit guidance on when to use this versus the sibling get_doc_page, which is the natural follow-up tool for fetching a full page once a search result is found. No prerequisites, no note on query phrasing strategy or result count. Usage is only inferrable from the name and verb.

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