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petri-net-sim

pns-server MCP Server

get_network_bounds

Retrieve the spatial bounding box and center of all Petri net elements to determine the current layout extent before adding new components.

Instructions

Return the spatial bounding box of all elements in the net.

Use to understand the current layout extent before adding new elements or deciding where to place a new pattern relative to existing ones.

Returns: min_x, max_x — horizontal extent min_y, max_y — vertical extent center_x, center_y — geometric center of all elements width, height — overall canvas span element_count — total places + transitions

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior4/5

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

No annotations are provided, but the description discloses the return fields in detail and implies a read-only operation. It does not mention any side effects or performance concerns, which is acceptable for a simple query tool.

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 very concise: a one-sentence purpose, a brief usage note, and a bulleted list of return fields. Every sentence adds value, and the structure is front-loaded.

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

Completeness4/5

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

Given the tool is simple (no parameters, clear output), the description is complete enough. It explains purpose, usage context, and all return fields. Minor omission: no mention of coordinate units or whether all elements are included, but not critical.

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

Parameters4/5

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

The tool has no parameters, so schema coverage is effectively 100%. The description adds no parameter info, which is appropriate. Baseline for zero parameters is 4.

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 'Return the spatial bounding box of all elements in the net' with a specific verb and resource. It distinguishes itself from siblings like 'find_free_position' and 'auto_layout' by focusing on the overall extent.

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?

It explicitly says 'Use to understand the current layout extent before adding new elements or deciding where to place a new pattern relative to existing ones,' giving clear context for when to use. It does not explicitly state when not to use or list alternatives, but the guidance is sufficient.

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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