Use this to find what changed between two server checks. Compares two run artifacts and surfaces regressions (things that broke), recoveries (things that got fixed), schema drift (added/removed/changed tool parameters), and gate status changes. Essential after updating a server.
Part of the Mcp Observatory server.
Free to start. No card required.
AI agents invoke diff_runs to trigger processes or run actions in Mcp Observatory. Execute operations can have side effects beyond the immediate call -- triggering builds, sending notifications, or starting workflows. Rate limits and argument validation are essential to prevent runaway execution.
diff_runs can trigger processes with real-world consequences. An uncontrolled agent might start dozens of builds, send mass notifications, or kick off expensive compute jobs. PolicyLayer enforces rate limits and validates arguments to keep execution within safe bounds.
Execute tools trigger processes. Rate-limit and validate arguments to prevent unintended side effects.
{
"version": "1",
"default": "deny",
"tools": {
"diff_runs": {
"limits": [
{
"counter": "diff_runs_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}See the full Mcp Observatory policy for all 13 tools.
These attack patterns abuse exactly the kind of access diff_runs gives an agent. Each links to the full case and the policy that stops it:
Other execute tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.
Use this to find what changed between two server checks. Compares two run artifacts and surfaces regressions (things that broke), recoveries (things that got fixed), schema drift (added/removed/changed tool parameters), and gate status changes. Essential after updating a server.. It is categorised as a Execute tool in the Mcp Observatory MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Mcp Observatory MCP server in PolicyLayer and add a rule for diff_runs: 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 Mcp Observatory. Nothing to install.
diff_runs is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the diff_runs 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 diff_runs. 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.
diff_runs is provided by the Mcp Observatory MCP server (@kryptosai/mcp-observatory). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 13 Mcp Observatory tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
4,600+ MCP servers and 31,000+ tools scanned and risk-classified.