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 and the description does not contradict it. The description adds only the chaining detail (ids/slugs feed find_session); it says nothing about result size, ordering, or whether the list is complete.

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?

Two short sentences, no filler, with the discovery purpose front-loaded and the chaining instruction immediately after. Every clause earns its place.

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 parameters, a full annotation set, and an output schema, the definition is essentially complete; the description correctly avoids restating return structure. The only minor gap is that it does not say whether the catalog list is fixed or environment-specific and whether results are ordered or paginated.

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?

There are zero input parameters, so the baseline is 4 and there is nothing for the description to compensate for. The mention of ids and slugs describes outputs rather than inputs, which is helpful orientation but not parameter semantics.

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?

"Discover Duoly games for teammates and coaching" names the resource (games) and the domain it applies to, so an agent knows this is a catalog/discovery listing rather than a lookup. It is slightly weaker than a precise verb+scope statement ("discover" instead of "list all"), and it does not contrast with list_services beyond the noun.

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?

It gives an explicit follow-up path: take a returned id or slug into find_session, which effectively tells the agent this tool precedes session lookup. It stops short of stating when-not to call it (e.g., if you already have an id/slug, skip straight to find_session), so it is clear context without full exclusion guidance.

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