Generates and writes BUGFIX_SPEC.md with current behavior, expected behavior, unchanged behavior, root cause analysis, and test plan. Not gated by the state machine.
AI agents use sdd_write_bugfix to create or update resources in Specky — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Specky environment.
This tool creates or updates a specification document (BUGFIX_SPEC.md) with structured content about bug fixes. While it modifies files, the changes are reversible (the file can be edited, deleted, or regenerated). It does not execute code, trigger external operations, delete data irreversibly, or move money.
From the tool's definition Tool description states it 'Generates and writes BUGFIX_SPEC.md', indicating it creates/modifies a documentation file.
Risk signalsAdmin/system-level operation
Documented attack patterns abuse exactly the kind of access sdd_write_bugfix gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Specky, and nothing reaches the server without passing your rules. This is the rule we recommend for sdd_write_bugfix:
{
"version": "1",
"default": "deny",
"tools": {
"sdd_write_bugfix": {
"limits": [
{
"counter": "sdd_write_bugfix_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}sdd_write_bugfix 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.
Generates and writes BUGFIX_SPEC.md with current behavior, expected behavior, unchanged behavior, root cause analysis, and test plan. Not gated by the state machine. It is categorised as a Write tool in the Specky MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Specky MCP server in PolicyLayer and add a rule for sdd_write_bugfix: 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 Specky. Nothing to install.
sdd_write_bugfix 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 sdd_write_bugfix 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 sdd_write_bugfix. 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.
sdd_write_bugfix is provided by the Specky MCP server (paulasilvatech/specky). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Specky, 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.
56 Specky tools catalogued and risk-classified — across an index of 43,000+ MCP servers.