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List model objects

aris_list_model_objects
Read-onlyIdempotent

List the EPC functions, events, and rule operators of an ARIS model by providing its model_id.

Instructions

List the EPC objects (functions/events/rule operators) of a model.

Input Schema

NameRequiredDescriptionDefault
model_idYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv1.3.1

TDQS

B3.1/5.0
Behavior3/5

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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint and destructiveHint=false, so the safety profile is fully covered. The description's only added behavioral value is clarifying the scope of returned entities (EPC functions/events/rule operators); it says nothing about pagination, volume, or ordering.

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?

A single front-loaded sentence with zero filler; the scope qualifier is placed directly on the resource it modifies.

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 read-only list tool whose annotations carry the safety profile and with no output schema to explain, the description is adequate on purpose but silent on the one parameter it requires and on return shape/pagination. Minimum viable rather than complete.

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?

Schema description coverage is 0% and there is one required parameter, model_id. The description never explains what a model_id is, its format, or how to obtain one (e.g., from aris_list_models), so it does not compensate for the schema gap.

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?

Specific verb (List) plus resource (EPC objects of a model), and it enumerates what counts as an object (functions/events/rule operators). That enumeration implicitly separates it from siblings like aris_list_model_connections and aris_list_model_attributes, though no sibling is named.

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 when-to-use guidance, no prerequisites, and no mention of the alternatives (list_model_attributes, list_model_connections, get_model) that an agent would need to choose between. Usage is only inferable from the name and the required model_id.

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