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

With no annotations, the description carries the full burden. It does disclose a meaningful behavioral trait: results are permission-scoped to what the caller can run, plus public h/ agents. However, it says nothing about pagination behavior (the page/size params imply paged results) or read-only semantics beyond what "List" implies.

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 front-loaded sentence with no filler; the scope qualifier follows the object it modifies. Appropriately sized, though it is arguably too terse to cover pagination.

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?

An output schema exists, so return values need not be described. For a simple read-only listing tool this is close to adequate, but with no annotations and no pagination guidance, an agent can't tell how to page through results.

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 0% and both parameters (page, size) are undocumented in the schema. The description adds nothing about paging or result limits, so it fails to compensate for the coverage gap.

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 specific verb and resource ("List agents") and scopes it precisely: agents the caller can run, including the org's own plus public h/ ones. That scope nuance is genuinely informative. It doesn't differentiate from siblings, but the sibling set (session/file/session controls) doesn't overlap, so no confusion arises.

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 when-to-use or when-not-to-use guidance and no named alternative. The phrase "agents the caller can run" vaguely implies you call this to discover runnable agents before using run_agent, but that inference is left entirely to the agent.

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