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Set object attributes

aris_set_object_attributes
Idempotent

Set or update attributes on one ARIS object by providing its object ID and attribute values.

Instructions

Write/update attributes on a single object.

Input Schema

NameRequiredDescriptionDefault
object_idYes
attributesYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv1.3.1

TDQS

C2.7/5.0
Behavior2/5

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

The annotations already declare readOnlyHint=false, idempotentHint=true, destructiveHint=false and openWorldHint=true, so 'write/update' is largely redundant with structured data. The description contributes no additional behavior — no merge-vs-replace semantics, no auth/permission requirements, no note on what happens to unlisted attributes.

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?

One short front-loaded sentence with no filler or repetition. The brevity is earned structurally, though it is under-specification rather than true conciseness.

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?

For a mutating tool with a nested open-ended object parameter, no output schema, no schema descriptions and only one line of prose, an agent lacks the information needed to call it confidently. The mutation semantics and attribute format are the main missing pieces.

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 coverage is 0% and the two parameters are undocumented: object_id's expected identifier form and the attributes object's key/value shape and naming convention are unexplained. Critically, the description never says whether attributes are merged into existing ones or replace them, which is the single most consequential semantic for a 'set' tool with a free-form nested object.

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?

States a specific verb pair (write/update) and resource (attributes on a single object), and the scope word 'single object' separates it from the sibling aris_list_model_objects and from the model-level aris_set_model_attributes. It's clear enough to route on, though it never names a sibling explicitly.

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?

There is no when-to-use guidance, no prerequisites (e.g., must the object already exist, does it need a lock/checkout), and no mention of how this differs from aris_set_model_attributes or the list_* readers. The agent is left to infer everything from the name.

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