Add a JSON schema to a collection. Provide the schema content as a JSON string.
AI agents use add_schema to create or update resources in Codehooks Io MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Codehooks Io MCP Server environment.
The tool performs a schema modification operation ('add'), which is fundamentally a write action that creates or updates metadata. While schema changes can have wide-ranging effects on data validation and processing, the operation itself is reversible (schema can be updated or removed). This distinguishes it from Destructive actions.
From the tool's definition Tool explicitly performs 'Add a JSON schema to a collection', which modifies collection metadata by creating or updating schema definitions. This is a reversible write operation that alters data structure definitions rather than instance data.
Documented attack patterns abuse exactly the kind of access add_schema gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Codehooks Io MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for add_schema:
{
"version": "1",
"default": "deny",
"tools": {
"add_schema": {
"limits": [
{
"counter": "add_schema_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}add_schema 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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Add a JSON schema to a collection. Provide the schema content as a JSON string. It is categorised as a Write tool in the Codehooks Io MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Codehooks Io MCP Server MCP server in PolicyLayer and add a rule for add_schema: 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 Codehooks Io MCP Server. Nothing to install.
add_schema 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 add_schema 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 add_schema. 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.
add_schema is provided by the Codehooks Io MCP Server MCP server (restdb/codehooks-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Codehooks Io 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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20 Codehooks Io MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.