search_items

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

No annotations are provided, so the description carries full burden for behavioral disclosure. It reveals nothing about whether this is a read/write operation, authentication requirements, rate limits, pagination behavior (beyond what's implied by continuationToken in schema), error conditions, or response format. For a search tool with 5 parameters and no output schema, this is critically inadequate.

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?

While technically concise (two words), this is under-specification rather than effective brevity. The description fails to front-load essential information and doesn't earn its place - it provides almost no value beyond the tool name itself. A truly concise description would still convey core purpose and context.

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's complexity (5 parameters, no output schema, no annotations), the description is completely inadequate. It doesn't explain what 'items' are, what search capabilities exist, how results are returned, or any behavioral characteristics. For a search operation that likely returns structured data, the absence of output schema means the description should at minimum indicate the nature of returned results.

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 100%, so the schema fully documents all 5 parameters. The description adds no parameter information beyond what's already in the schema. According to scoring rules, when schema coverage is high (>80%), the baseline is 3 even with no param info in description.

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 'PlayFab search items' is a tautology that merely restates the tool name with a platform prefix. It doesn't specify what 'items' refers to (catalog items, inventory items, etc.), what action 'search' performs (filtering, text search, or both), or what resource domain this operates in. While it distinguishes from the sibling tools (which target players/segments rather than items), the purpose remains vague.

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?

The description provides no guidance on when to use this tool versus alternatives. There's no mention of prerequisites, appropriate contexts, or comparison with other search methods. The sibling tools (get_all_players, get_all_segments) target different resources, but the description doesn't help an agent decide between searching items versus retrieving players/segments.

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