get_updates

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

Annotations only declare readOnlyHint=true, so the description carries the rest of the load, and it does disclose the full status taxonomy (supported, ending_soon, ended, unknown, untracked) plus the fact that coverage is 'every monitored host' with no filtering. It stops short of describing the shape of the returned data or how fresh it is.

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 dense sentence with no filler, front-loaded with the primary action and resource. The compound scope (updates plus host OS EOL) is packed into one clause chain, which slightly reduces scannability but wastes no words.

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 no output schema, the description is responsible for conveying what comes back, and it does explain the host/EOL half in detail including status values and dates. The image-update half is described only at a high level, leaving the fields of each update entry unstated, which is a minor gap for a dual-purpose read tool.

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?

The tool takes zero parameters and the schema is closed with additionalProperties=false, so there is no parameter meaning to convey. Baseline 4 applies; nothing in the description misleads about inputs.

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?

Uses a specific verb (List) with two clearly named resources: available image updates for monitored containers, and per-host OS end-of-support status. The enumerated status vocabulary makes the scope unambiguous. It does not explicitly contrast itself with siblings like list_containers or get_container, which is the only thing keeping it from a 5.

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 explicit when-to-use statement or named alternative; a caller has to infer that this is the tool for update availability and end-of-life reporting. For a zero-parameter read tool the implied usage is fairly obvious, but nothing states when to prefer it over list_containers or get_endpoint_history.

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