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

Annotations already declare the safe read-only, idempotent, open-world profile. The description adds value beyond them by disclosing the return behavior ('an answer with citations'), which matters because there is no output schema. It could say more (e.g. latency or freshness), but this is solid added context.

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 action and scope, and it packs the documentation URL and return format without waste. Every element earns its place.

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 single-parameter, no-output-schema tool, the description covers purpose, input nature, and return shape adequately. Minor room to note scope limitations of the underlying docs, but nothing an agent needs to call it correctly is missing.

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 coverage is 100% for the single 'query' parameter, so the schema already documents it. The description adds only that the query is free-form, which is a marginal semantic addition over the schema's 'query to search the documents'. Baseline 3 is appropriate.

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 (Unified.to API and MCP documentation), even naming the doc site. This is clearly distinguished from the CRUD siblings that manipulate connections, environments, and webhooks.

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?

Characterizing the input as 'a free-form question' implies the usage context (lookup/QA rather than structured queries), but there is no explicit when-to-use or when-not-to-use guidance. No sibling performs documentation lookup, so an alternative is not strictly needed, leaving this at implied usage.

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