AI agents use create_datasource to create or update resources in Storyblok MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Storyblok MCP Server environment.
Create operations that generate new data structures are classified as Write when they are reversible and do not execute arbitrary code or delete data. In a CMS context, datasources are typically content configuration elements that can be modified or removed later. Severity is medium because misconfigured datasources could affect content delivery or data integrity, but the impact is confined to that datasource.
From the tool's definition Tool name 'create_datasource' indicates creation of a data structure. Given the Storyblok CMS context where datasources are managed content entities, this operation creates reversible data artifacts.
Documented attack patterns abuse exactly the kind of access create_datasource gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Storyblok MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for create_datasource:
{
"version": "1",
"default": "deny",
"tools": {
"create_datasource": {
"limits": [
{
"counter": "create_datasource_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}create_datasource 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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create_datasource. It is categorised as a Write tool in the Storyblok MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Storyblok MCP Server MCP server in PolicyLayer and add a rule for create_datasource: 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 Storyblok MCP Server. Nothing to install.
create_datasource 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 create_datasource 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 create_datasource. 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.
create_datasource is provided by the Storyblok MCP Server MCP server (arjuncodess/storyblok-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Storyblok MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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115 Storyblok MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.