Update a Slab post with new content. Edits will be attributed to your user account.
AI agents use slab__update_post to create or update resources in Slabby — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Slabby environment.
This tool creates or modifies data (documentation posts) in a reversible manner. Updates to knowledge base posts can be undone or corrected, distinguishing it from destructive operations. While it modifies shared documentation that could affect team workflows, it does not delete data, execute code, or involve financial transactions.
From the tool's definition Tool description states 'Update a Slab post with new content. Edits will be attributed to your user account.' The verb 'update' and explicit mention of modifying content indicates reversible modification of existing documentation.
Documented attack patterns abuse exactly the kind of access slab__update_post gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Slabby, and nothing reaches the server without passing your rules. This is the rule we recommend for slab__update_post:
{
"version": "1",
"default": "deny",
"tools": {
"slab__update_post": {
"limits": [
{
"counter": "slab__update_post_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}slab__update_post 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.
Free to start. No card required.
Update a Slab post with new content. Edits will be attributed to your user account. It is categorised as a Write tool in the Slabby MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Slabby MCP server in PolicyLayer and add a rule for slab__update_post: 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 Slabby. Nothing to install.
slab__update_post 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 slab__update_post 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 slab__update_post. 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.
slab__update_post is provided by the Slabby MCP server (russwyte/slabby). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Slabby, 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.
4 Slabby tools catalogued and risk-classified — across an index of 43,000+ MCP servers.