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

Annotations declare readOnlyHint, idempotentHint, and openWorldHint=false, so the safety profile is covered. The description adds useful non-obvious context: that it also returns the default version and hints where to look for the version-edition-product tuple, and clarifies a tempting but wrong inference (it does NOT determine deployment). It stops short of describing the return shape or ordering.

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?

Three compact sentences, front-loaded with what it returns and immediately followed by the routing guidance. The exclusions run slightly dense but every clause is load-bearing.

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 zero-param, read-only discovery tool with a fully-covered (empty) schema and clear annotations, the description answers what it returns, when to call it, and which sibling to use instead. Nothing an agent needs to invoke it correctly is missing.

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?

Zero parameters, so the baseline is 4. The description sensibly explains the output's role as an input value for 'version', which is the salient semantic for a no-arg discovery 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 verb (Lists) and resource (documentation versions plus the default), and explicitly names the sibling it is not (resolve_openvidu_version_edition_product). An agent can distinguish it from siblings without opening any schema.

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?

Gives an explicit triggering condition ("Use it if you don't know what value to pass for 'version'") and an explicit exclusion with the correct alternative named ("It does NOT establish the user's deployment... call 'resolve_openvidu_version_edition_product'"). This is a textbook when/when-not/alternative routing.

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