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

With sparse annotations, the description adds real behavioral context: authentication requirements (owner session, org key insufficient), that it only reads site metadata, and that Google access/refresh tokens stay encrypted server-side. Note a mild tension: "Reads site metadata only" reads as read-only while readOnlyHint=false, though false is the conservative default and resolve may refresh tokens, so this is not a true contradiction.

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?

Purpose and the Search Console exclusion are front-loaded, but the body is a run of short fragments with redundancy: "Requires the owner's account session" and "Requires an account session in this organization" say nearly the same thing. Some trimming would tighten it without losing meaning.

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 3-parameter tool with no output schema, the description covers scope, auth prerequisites, service routing, and data-handling behavior, which is close to sufficient. What the resolve step actually returns (property-to-URL mapping) is implied rather than stated, a minor gap given no output schema exists.

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%, so the schema already documents service, properties (min/max/unique) and organization_id; the baseline is 3. The description only echoes the 20-property cap and hints that the service enum matters, adding little beyond the structured fields.

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 states a specific verb and resource (resolve website addresses for selected Analytics properties) and bounds the scope (up to 20 properties), which is enough to distinguish it from generic sibling calls like google_catalog or google_connect. It does not name the nearest siblings it complements, but the purpose is unambiguous.

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?

It gives an explicit exclusion ("Search Console does not use this route") plus preconditions (owner's account session required, organization key cannot authorize Google access). It lacks a positive statement of when to prefer this over google_catalog/google_connect, so it falls just short of full routing guidance.

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