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

Annotations already declare readOnlyHint=true, so the agent knows this is a safe read operation. The description adds the 'including all seasons' detail, which is useful but minimal. It doesn't describe the return format or any additional behavior, though the output schema exists to cover that. This is acceptable but not rich.

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—two short sentences plus the args line. It front-loads the purpose and includes the example efficiently. Every word earns its place with no fluff or repetition.

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 single-parameter read-only tool, the description is largely complete. The output schema handles return values, and the example clarifies the parameter. It could mention what 'detailed information' encompasses, but given the low complexity, it's adequate.

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?

The schema only specifies series_id as an integer with no description (0% coverage), so the description's example ('e.g., 2355 for الدحيح') adds concrete value by clarifying the expected value. It also explicitly calls it 'numeric ID,' reinforcing the type. This compensates well for the schema's lack of 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 clearly states the tool retrieves detailed series information, including all seasons, and provides an example ID. It identifies the resource (series) and the verb (get), but it doesn't distinguish from sibling tools like get_series_seo_map or get_series_seo_map, which might also target series details. Without that differentiation, it's clear but not fully distinct.

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 like get_season_episodes or get_series_seo_map. It doesn't mention any conditions, prerequisites, or exclusions, leaving the agent to infer usage from the name alone.

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