join_cluster

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

With no annotations, the description only states the basic action. It does not disclose potential side effects (e.g., service disruption), authorization requirements beyond the password parameter, or any destructive implications.

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 description is extremely concise with a clear structure: a one-line purpose followed by a bulleted list of parameters. Every sentence adds value with no redundancy.

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?

Given the tool has an output schema and moderate complexity, the description adequately covers parameters but misses cluster context (e.g., cluster must be initialized, node must be reachable). It is minimally complete.

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%, so the description compensates by explaining each parameter (e.g., 'force: Force join even with warnings'). These short explanations add meaning beyond the schema titles.

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 clearly states 'Join a node to an existing cluster', which is a specific verb+resource action. It distinguishes itself from sibling cluster tools (e.g., get_cluster_config, create_cluster_firewall_rule) by focusing on the joining operation.

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?

No guidance is provided on when to use this tool versus alternatives, nor any prerequisites like cluster existence or node preparation. The description lacks context on appropriate scenarios.

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