Tower versions

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

Annotations only declare readOnlyHint=true, so the description must carry auth and data-handling context; it does say "Authenticated" and warns that evidence is untrusted with citation/uncertainty obligations, which is genuine added value for a read tool. But it says nothing about what is returned, whether lookups fail for unknown capabilities, or how minimum_version comparison behaves when the environment is omitted.

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?

It is short (two sentences) and the operational trust caveat is front-loaded, but "Authenticated Control Tower versions" is a near-tautological opener that consumes the prime position without conveying purpose, and the human-approval sentence is arguably out of scope for a read-only lookup.

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?

A version-comparison query with two undocumented required parameters and no output schema needs the description to explain input format and result semantics; it supplies neither. The only genuinely useful content is the trust/citation guidance, which leaves an agent unable to call the tool correctly with any confidence.

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% across three parameters (capability, environment, minimum_version), and the description adds no meaning for any of them: it never explains the expected capability vocabulary, whether environment narrows the lookup, or the accepted version format/parsing rules. With two required parameters entirely undocumented in both places, this is a serious 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?

"Authenticated Control Tower versions" restates the title (Tower versions) plus an auth qualifier; it never states what the tool actually returns or does. An agent reading only this cannot tell whether it lists versions, checks version compatibility, or pins a minimum version, and no sibling (e.g. core.compatibility, tower.capability_contract) is named as the alternative.

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 guidance, no exclusions, and no mention of the closely related siblings such as core.compatibility or tower.capability_contract that an agent would plausibly confuse this with. The closing note about human approval via Tower HTTP/CLI is a process remark, not invocation guidance.

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