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nkarasiak

QGIS MCP

by nkarasiak

Delete Features

delete_features
Destructive

Remove unwanted features from a QGIS layer by providing feature IDs or a filter expression.

Instructions

Delete features by feature IDs or expression filter. Provide either fids (list of ints) or expression (string), not both.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
layer_idYes
fidsNo
expressionNo
Behavior3/5

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

The annotation destructiveHint: true already signals destructiveness. The description adds the mutual exclusivity constraint but does not disclose whether deletions are permanent, if undo is possible, or behavior when both parameters are provided.

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 sentence of 13 words, front-loading the key purpose and constraints with no redundancy.

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

Completeness3/5

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

For a simple deletion tool with 3 parameters, the description covers the optional params and their relationship but omits guidance on the required layer_id and behavioral details like error handling or commit behavior, leaving some incompleteness.

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?

With 0% schema description coverage, the description adds meaning by explaining the mutual exclusivity of fids and expression. However, it does not explain the required layer_id parameter or the format of the expression string, leaving gaps.

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

Purpose5/5

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

The description clearly states it deletes features, specifying two distinct methods (by IDs or expression), which distinguishes it from sibling tools like add_features or update_features.

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

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description provides explicit guidance that fids and expression are mutually exclusive, helping the agent choose parameters correctly. However, it does not contrast with alternative deletion tools like remove_layer or delete_field.

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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