Update label, description, or entity association of an image
AI agents use update_image_metadata to create or update resources in DMCP — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your DMCP environment.
This tool modifies metadata attributes of images (label, description, entity association) without deleting or destroying data. These changes are reversible edits, placing it in the Write category. Severity is medium because metadata corruption could degrade game experience or confuse state tracking, but the blast radius is limited to image metadata rather than core game state or financial systems.
From the tool's definition The tool description states it can 'Update label, description, or entity association of an image' — update operations modify existing data reversibly.
Documented attack patterns abuse exactly the kind of access update_image_metadata gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and DMCP, and nothing reaches the server without passing your rules. This is the rule we recommend for update_image_metadata:
{
"version": "1",
"default": "deny",
"tools": {
"update_image_metadata": {
"limits": [
{
"counter": "update_image_metadata_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}update_image_metadata stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
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Update label, description, or entity association of an image. It is categorised as a Write tool in the DMCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the D MCP server in PolicyLayer and add a rule for update_image_metadata: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches DMCP. Nothing to install.
update_image_metadata is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the update_image_metadata rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for update_image_metadata. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
update_image_metadata is provided by the D MCP server (shawnrushefsky/dmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from DMCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
204 DMCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.