sysknife_apt_list_upgradable

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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint=false, so the safety profile is fully covered by structured data; the description's 'read-only' appears twice, adding no new information. The 'no params' note is useful but there is no hint about the shape of results (package names/versions/count), which is the only behavior left unexplained.

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?

Very short and front-loaded: action name, one-line behavior, scope, then usage examples. The only waste is the redundant 'Read-only ... read-only' repetition, which could have been said once.

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 zero-parameter, read-only list tool whose safety semantics are fully carried by annotations and which has no output schema; the description covers purpose and invocation triggers adequately. A brief note on what the listing contains would fully close the gap.

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?

Parameter count is zero, so the baseline is 4, and the description correctly and explicitly states 'no params', confirming there is nothing to supply. Nothing further is needed for a no-argument tool.

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 action and resource: 'list packages with available upgrades', which is concretely distinct from listing installed packages or apt history. It does not explicitly name the sibling it is not (sysknife_apt_list_installed, sysknife_apt_history_list), so differentiation is inferable rather than stated.

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?

Provides concrete trigger phrases — 'are there pending updates?' and 'what updates are available?' — that map cleanly to the agent's intent. It gives no explicit when-not guidance or named alternative for the installed/history variants, so the routing guidance is clear but not complete.

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