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

No annotations are provided, so the description carries the behavioral disclosure burden. It does convey that this is a download and adds a non-obvious expiry constraint, but it does not disclose side effects, behavior after expiration, or error/response expectations.

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?

The description is a single seven-word sentence with no filler or repetition. The action, resource, and timing qualifier are front-loaded, and the schema is left to document parameters.

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 only two required scalar parameters and no output schema, the description plus schema is nearly complete: the agent knows the required IDs and that the result is a CSV. It could still mention what happens after expiry, but the tool is simple enough that this is not a major gap.

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 both string parameters are already self-explanatory. The description adds no per-parameter meaning, but none is needed; the baseline of 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?

The description states a concrete action (Download) and resource (tenant CSV) plus a distinctive time qualifier (before expiry). It is clear on its own, but it does not explicitly differentiate from sibling download/export tools such as commsharbor_contacts_export or commsharbor_data_export_download.

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 phrase 'before expiry' implies the tool should be used while a generated CSV is still valid, providing some usage context. However, it does not contrast this tool with alternatives or state when not to use it, so an agent must infer routing.

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