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unassign_category

Remove a game from a category in your Lutris gaming library to reorganize your collection and maintain organized categories.

Instructions

Remove a game from a category

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
game_idYesGame ID
category_nameYesCategory name

Implementation Reference

  • The handler function that implements the logic for the "unassign_category" tool.
    server.tool(
      "unassign_category",
      "Remove a game from a category",
      {
        game_id: z.coerce.number().describe("Game ID"),
        category_name: z.string().describe("Category name"),
      },
      async (params) => {
        try {
          const category = getCategoryByName(params.category_name);
          if (!category) {
            return {
              content: [{ type: "text", text: `Category "${params.category_name}" not found.` }],
              isError: true,
            };
          }
    
          const removed = unassignCategory(params.game_id, category.id);
          if (!removed) {
            return {
              content: [
                { type: "text", text: "Game was not in that category." },
              ],
              isError: true,
            };
          }
    
          return {
            content: [
              {
                type: "text",
                text: JSON.stringify(
                  { message: `Game removed from "${category.name}".` },
                  null,
                  2
                ),
              },
            ],
          };
        } catch (error) {
          return handleError(error);
        }
      }
    );
  • Database helper function that executes the removal of a game from a category.
    export function unassignCategory(gameId: number, categoryId: number): boolean {
      const db = getDatabase();
      const result = db
        .prepare(
          "DELETE FROM games_categories WHERE game_id = ? AND category_id = ?"
        )
        .run(gameId, categoryId);
      return result.changes > 0;
    }
Behavior2/5

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It states the action is 'Remove', implying a mutation, but does not cover permissions, reversibility, error conditions, or side effects. This leaves significant gaps for a tool that modifies data.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, direct sentence with no wasted words, making it highly concise and front-loaded. It efficiently communicates the core purpose without unnecessary elaboration.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the tool performs a mutation with no annotations and no output schema, the description is incomplete. It lacks information on behavioral traits, error handling, and what happens upon success, which are critical for safe and effective use by an AI agent.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The input schema has 100% description coverage, clearly documenting both parameters ('game_id' and 'category_name'). The description adds no additional meaning beyond what the schema provides, such as format details or constraints, so it meets the baseline for high schema coverage.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the action ('Remove') and the target ('a game from a category'), which is specific and unambiguous. However, it does not explicitly differentiate this tool from its sibling 'assign_category' beyond the opposite action, missing a direct comparison that would elevate it to a 5.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

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 'assign_category' or 'remove_game', nor does it mention prerequisites such as the game being assigned to the category. It lacks context for selection among sibling tools.

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

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