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

readOnlyHint and destructiveHint=false already tell the agent this is a safe read, so the description's main added value is the endpoint and the field inventory. It says nothing about default ordering, page-size defaults (left to the schema), or how 'running timers' interacts with date filters — modest extra context beyond annotations.

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 sentences, front-loaded with the resource and field list, ending with the endpoint. No filler, though the parenthetical field enumeration is dense and slightly list-like rather than prioritized.

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 read-only, zero-required-parameter list endpoint with full schema documentation and no output schema, the description covers purpose, retrievable fields, filter axes, and the underlying route. Nothing an agent needs in order 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 description coverage is 100%, so every one of the 11 parameters is already documented with formats and defaults. The description only summarizes the filter groups (ticket, agent, company, billable, timers, dates) without adding semantics such as whether filters combine with AND or how created/started/updated differ.

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 and resource ('List logged time entries'), enumerates the returned fields, and names the filter dimensions, so the agent knows exactly what it retrieves. It does not explicitly contrast itself with desk365_get_time_entry, but 'list' vs 'get' plus the plural scope makes the distinction inferable.

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 filter list implies when the tool is useful (by ticket, agent, company, billable, running timers, dates), but it never states when to prefer it over desk365_get_time_entry or desk365_list_tickets, nor any pagination/ordering expectations. Usage is implied rather than guided.

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