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zoom_to_layer

Adjusts the map view to the full extent of a specified QGIS layer.

Instructions

Zoom to the extent of a specified layer.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
layer_idYes
Behavior2/5

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

No annotations are provided, so the description carries full burden. It discloses the basic action but lacks details on side effects, permissions, or whether it modifies state. For a read-like operation, it should explicitly state it is non-destructive.

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

Conciseness4/5

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

The description is a single concise sentence without unnecessary words. However, it could benefit from slight structuring, such as mentioning the parameter briefly.

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 simplicity of the tool (one parameter, no output schema), the description is too minimal. It lacks clarity on the format of layer_id and what 'extent' means, leaving an agent without enough context to use the tool correctly.

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

Parameters2/5

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

The single parameter layer_id is only defined in the schema as a required string with no description. The tool description does not clarify what layer_id represents (e.g., name, UUID) or how to obtain it, failing to add meaning beyond the schema.

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 'Zoom to the extent of a specified layer' clearly states the action (zoom) and the resource (layer extent), distinguishing it from sibling tools like remove_layer or get_layers.

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?

No guidelines on when to use this tool versus alternatives like get_layers or save_project. The description implies usage but provides no contextual guidance or exclusions.

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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