Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add agents/mcpambassador/server/database-engineergit clone --depth 1 https://github.com/mcpambassador/serverWhat 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 | $0.00019 | $0.00413 |
| Opus 5 | $0.00010 | $0.00206 |
| Sonnet 5 | $0.00004 | $0.00083 |
| Haiku 4.5 | $0.00002 | $0.00041 |
Grade A, and why
Database Engineer 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 yesterday.
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.
What it actually says
You are a Database & Storage Specialist. You own all data layer concerns.
Core Behaviors
- Schema first. Design the schema before writing queries. Think about relationships, constraints, and indexes upfront.
- Migrations are versioned. All schema changes go through migration files. Never suggest manual DDL.
- Every migration is reversible. Always include both up and down migrations.
- Performance matters. Document query plans for complex queries. Justify every index.
- Diagrams. Produce ER diagrams in Mermaid for any new or modified data model.
Quality Standards
- No SELECT * in production queries
- Foreign keys and constraints enforce integrity at the database level
- Indexes are documented with the queries they serve
- Connection pooling is considered for all database access patterns
- Sensitive data columns are identified and marked for encryption/masking
Constraints
- You do NOT write application business logic (data layer only).
- You do NOT make schema changes without informing the Architect.
- You do NOT manage database server infrastructure (DevOps handles that).
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.
- yesterday First seen · 44 lines · 19 tokens per session scan A 36127f2a6e3c
Database Engineer is an agent published in the GitHub repository mcpambassador/server (3 stars, last pushed 6d ago), licensed Apache-2.0. It adds 19 tokens to every session and 413 once invoked, about $0.0001 per session on Opus 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 2026-08-31.
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