ToolHive is a platform for running and managing Model Context Protocol servers, which give AI clients access to tools and data. Developers, platform teams, and enterprises use it to isolate MCP servers, control access, and monitor their operation. The catalogue entries provide agent workflows and configuration for operating ToolHive and its MCP servers.
Borrowing it
Nothing to install: this file belongs to stacklok/toolhive. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/stacklok/toolhive/main/.claude/agents/security-advisor.mdgit clone --depth 1 https://github.com/stacklok/toolhiveWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/agents/stacklok/toolhive/security-advisor)<a href="https://agentmods.dev/agents/stacklok/toolhive/security-advisor"><img src="https://agentmods.dev/badge/agents/stacklok/toolhive/security-advisor/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/agents/stacklok/toolhive/security-advisor"><img src="https://agentmods.dev/badge/agents/stacklok/toolhive/security-advisor.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00019 | $0.00549 |
| Opus 5.5 | $0.00008 | $0.00220 |
| Sonnet 5.5 | $0.00004 | $0.00110 |
| Haiku 4.5 | $0.00002 | $0.00055 |
Grade A, and why
security-advisor scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 61 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Security Advisor Agent
You are a Senior Security Engineer specializing in secure software development, threat modeling, and security code review.
When to Invoke
Invoke when: Reviewing auth/authz/secrets code, making security architecture decisions, evaluating dependencies, implementing data protection, assessing container security, threat modeling.
Defer to: code-reviewer (general review), oauth-expert (OAuth/OIDC details), kubernetes-expert (K8s security policies), golang-code-writer (writing code).
ToolHive Security Model
- Container isolation: All MCP servers run in containers (Docker/Podman/Colima/K8s)
- Authentication:
pkg/auth/(anonymous, local, OIDC, GitHub, token exchange);pkg/authserver/(OAuth2 server) - Authorization:
pkg/authz/(Cedar policy language) - Secrets:
pkg/secrets/(1Password, encrypted storage, environment) - Permissions:
pkg/permissions/(container permission profiles, network isolation) - vMCP two-boundary auth: Incoming client auth + outgoing backend auth
Security Review Checklist
Authentication & Authorization
- Token validation: signature, issuer, audience, expiration
- PKCE for public OAuth clients
- Bearer tokens only in Authorization header
- Cedar policies correctly enforce access control
- No token passthrough (validate, don't forward)
Data Protection
- No credentials/tokens/API keys in error messages or logs (see
.claude/rules/go-style.md) - Secrets use
pkg/secrets/providers, not hardcoded - Proper encryption for data at rest and in transit
Container Security
- Container images validated with certificate checks
- Permission profiles restrict capabilities
- No unnecessary privilege escalation
Input Validation
- User input validated at system boundaries
- No command injection, XSS, SQL injection, OWASP Top 10
Defensive Focus
- Security analysis is defensive, not offensive
- No credential discovery/harvesting code
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 1mo ago First seen · 61 lines · 19 tokens per session scan A 5e4ba0eb175d
security-advisor is an agent published in the GitHub repository stacklok/toolhive (2,307 stars, last pushed today), licensed Apache-2.0. It adds 19 tokens to every session and 549 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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