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

With no annotations, the description carries the full burden and does add value: it discloses the return shape (channels, timeout, status) and an important auth behavior. The note that 'start_login does NOT open this tool' is a genuinely useful non-obvious trait that prevents a wrong remediation path.

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 tight sentences front-load the purpose and return shape, followed by a clearly separated ACCESS block. No filler, though the auth mechanics are somewhat verbose.

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 single-parameter read tool with no output schema, the description usefully enumerates the returned fields and covers the auth prerequisite. Nothing critical is missing for correct invocation.

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% for the single 'id' parameter, and the schema already documents it as 'HITL config ID'. The description's 'by ID' adds no format, source, or lookup detail beyond the schema, so the baseline of 3 applies.

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 ('Get a HITL config by ID') and enumerates the returned fields (channels, timeout, status). It implicitly distinguishes itself from list_hitls by requiring an ID, but never names the sibling alternative explicitly.

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 'by ID' phrasing implies you call this when you already have a config ID, and the ACCESS note tells the agent it must authenticate first. However there is no explicit guidance on when to prefer this over list_hitls or other HITL siblings.

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