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

The readOnlyHint annotation already declares this is a safe read, so the bar is lower. The description adds the underlying endpoint (GET /businesses) which reinforces read-only semantics, but it says nothing about pagination behavior, ordering, or result-set size — context that would be genuinely useful for a listing call.

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 the resource and scope front-loaded; nothing is padded. The trailing 'GET /businesses' is arguably redundant given the tool name, but it costs almost nothing.

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 simple, zero-required-parameter list tool with no output schema needed and annotations covering the safety profile, this is nearly complete. The only missing piece an agent would want is a note on pagination expectations, which is minor here.

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%: both page and per_page are fully documented in the schema with defaults and maximums. The description adds no parameter syntax or meaning beyond that, 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 (List) and resource (businesses) and adds the clarifying gloss '(practice locations),' which disambiguates the domain concept. It does not explicitly differentiate itself from the many other list_* siblings, but the resource name plus the clarifying gloss makes selection 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?

The description gives no when-to-use guidance, no prerequisites, and no mention of alternatives such as get_account or the other list_* tools. 'In the account' weakly implies an unfiltered full listing, but nothing tells the agent when this tool is the right choice versus another endpoint.

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