AI agents use wordpress_add_capability to create or update resources in WordPress MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your WordPress MCP Server environment.
Adding capabilities is a reversible Write operation that modifies WordPress user roles/permissions. While high-impact (affects access control), it does not irreversibly delete data (not Destructive) or move money (not Financial). Severity is high because misconfigured capability grants could grant dangerous permissions to unintended roles, affecting site security posture.
From the tool's definition Tool name 'wordpress_add_capability' indicates modification of user capabilities/permissions. Empty description limits certainty, but context of sibling tools (wordpress_assign_role, wordpress_activate_plugin) and server's 'complete site control' positioning…
Documented attack patterns abuse exactly the kind of access wordpress_add_capability gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and WordPress MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for wordpress_add_capability:
{
"version": "1",
"default": "deny",
"tools": {
"wordpress_add_capability": {
"limits": [
{
"counter": "wordpress_add_capability_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}wordpress_add_capability 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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wordpress_add_capability. It is categorised as a Write tool in the WordPress MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the WordPress MCP Server MCP server in PolicyLayer and add a rule for wordpress_add_capability: 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 WordPress MCP Server. Nothing to install.
wordpress_add_capability 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 wordpress_add_capability 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 wordpress_add_capability. 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.
wordpress_add_capability is provided by the WordPress MCP Server MCP server (raheesahmed/wordpress-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 190 WordPress MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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190 WordPress MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.