hcloud_list_dcs_instances

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

The annotations already declare readOnlyHint, idempotentHint, and openWorldHint, so the safety profile is covered without the description. The description adds only the DCS-equals-Redis clarification; it says nothing about filtering behavior, pagination, or what a listing contains.

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?

The single phrase is efficient and front-loaded with the verb, but its brevity stems from under-specification rather than disciplined editing. Nothing is wasted, but very little is delivered.

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 simple two-parameter read-only list operation this is close to sufficient, especially since annotations cover the safety profile. With no output schema, however, the description should at least indicate what fields a returned instance carries or how limit behaves.

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%, so both parameters (limit and required region) are documented by the schema itself. The description adds no semantics beyond that, and the bare "Region" and "Max results" schema texts give no format examples, so the baseline 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?

The description gives a specific verb and resource ("List DCS instances") and usefully expands DCS as Redis, which an agent may not know. It does not, however, distinguish itself from siblings such as hcloud_show_dcs_instance or hcloud_list_dcs_flavors, so the agent must infer the difference from the names alone.

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 guidance on when to prefer this tool over hcloud_show_dcs_instance or hcloud_list_dcs_flavors, and no mention of how to page through results using limit. Usage is only implied by the verb "List".

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