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

Annotations already declare readOnlyHint=true, so the safety profile is covered. The description adds value by naming the API endpoint and enumerating returned fields, but says nothing about paging behavior, default limits, or whether the list is scoped to the authenticated account.

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?

Three compact sentences with the resource and returned fields front-loaded and no filler. The trailing endpoint reference is marginally useful for traceability but is not required by an agent.

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 no-required-param read-only list tool with a fully documented schema and no output schema, the description covers enough: it enumerates the fields returned so the agent knows what it gets back and states the filtering dimension. Paging and default-limit behavior are left to the schema.

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%, so all six parameters (limit, offset, orderby, property_ids, updated-from/to) are fully documented in the schema itself. The description only gestures at the property filter and adds no syntax or format detail beyond what the schema provides.

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+resource ("List rental units") and itemizes the returned fields (unit number, beds/baths, size, market rent, listed/occupied status), which goes beyond a tautology. It does not distinguish itself from sibling buildium_get_rental_unit or buildium_list_rental_properties, so an agent must infer the single-vs-collection split itself.

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?

"Filter by property" implies the primary use case and corresponds to the property_ids parameter, so usage is suggested rather than spelled out. There is no when-not guidance and no mention of sibling alternatives such as get_rental_unit for a single unit.

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