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update_asset

Update an existing asset's metadata or file in your Contentful space. Specify the asset ID, space, and environment, then provide new title, description, or file details.

Instructions

Update an asset

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
assetIdYes
titleNo
descriptionNo
fileNo
spaceIdYesThe ID of the Contentful space. This must be the space's ID, not its name, ask for this ID if it's unclear.
environmentIdYesThe ID of the environment within the space, by default this will be called Mastermaster
Behavior1/5

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

Without annotations, the description must disclose behavioral traits. It only says 'Update', omitting any details about idempotency, overwrite vs merge behavior, required permissions, or side effects. This is insufficient for an AI agent.

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

Conciseness2/5

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

At three words, the description is under-specified rather than concise. It fails to provide essential information that an agent needs, making it inefficient for decision-making.

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

Completeness1/5

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

With no output schema, no annotations, and low schema coverage, the description should compensate but does not. It omits return values, error cases, and constraints, leaving the agent blind to critical usage details.

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

Parameters1/5

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

Schema description coverage is only 33%. The description adds no parameter explanations or examples, leaving 4 parameters (title, description, file, assetId) completely undocumented. The nested file object lacks context on allowed formats or size limits.

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

Purpose1/5

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

Description is a tautology: 'Update an asset' merely restates the tool name. It does not define what an asset is, what specific fields can be updated, or how it differs from sibling tools like update_entry or upload_asset.

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 guidance on when to use update_asset vs alternatives such as upload_asset (for creating) or publish_asset (for publishing). The description lacks any context about prerequisites or typical use cases.

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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