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

No annotations are provided, so the description carries the full behavioral burden, yet it discloses almost nothing: not whether the result is sorted, bounded, or paginated, not whether omitting 'since' returns all tools, and not what the response shape looks like. For a read-only list tool the risk is low, but the disclosure is still thin.

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?

A single short sentence with the filter condition front-loaded and no filler. It is terse but every word carries information, though the omission of default behavior is a small structural gap given the space available.

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 one optional parameter, no annotations, and no output schema, the description should at minimum explain the no-argument case and the nature of the returned list. It leaves the agent guessing about default behavior and result ordering.

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% and the schema already states the parameter is an ISO date-time, so the description's 'updated after an ISO timestamp (optional)' mostly repeats structured data. Baseline 3 is appropriate since the schema does the heavy lifting.

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 pairs the verb 'List' with the resource 'tools' and adds the filter condition 'updated after an ISO timestamp', so the operation is unambiguous. It does not, however, explicitly distinguish itself from the siblings get_tool or search_tools.

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?

There is no guidance on when to choose this tool over get_tool or search_tools, nor any note about what happens when 'since' is omitted. The only hint is the parenthetical '(optional)' on the parameter.

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