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 skills add isdaniel/mysqltuner_mcp --skill mysql-perf-tuninggit clone --depth 1 https://github.com/isdaniel/mysqltuner_mcpWrote 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/skills/isdaniel/mysqltuner_mcp/mysql-perf-tuning)<a href="https://agentmods.dev/skills/isdaniel/mysqltuner_mcp/mysql-perf-tuning"><img src="https://agentmods.dev/badge/skills/isdaniel/mysqltuner_mcp/mysql-perf-tuning/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/skills/isdaniel/mysqltuner_mcp/mysql-perf-tuning"><img src="https://agentmods.dev/badge/skills/isdaniel/mysqltuner_mcp/mysql-perf-tuning.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 | $0.00127 | $0.02676 |
| Opus 5 | $0.00063 | $0.01338 |
| Sonnet 5 | $0.00025 | $0.00535 |
| Haiku 4.5 | $0.00013 | $0.00268 |
Grade A, and why
mysql-perf-tuning 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 9d 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 — 238 lines — stays where its author put it; the contents beside it link to each section on GitHub.
MySQL Performance Tuning with mysqltuner_mcp
A systematic approach to MySQL performance tuning using the mysqltuner_mcp MCP server, which provides 39 diagnostic tools for analyzing and optimizing MySQL databases.
Prerequisites
This skill requires the mysqltuner_mcp MCP server to be connected. The server provides tools that query MySQL's performance_schema, information_schema, sys schema, and server status variables.
Before starting any tuning work, verify the MCP connection is active by calling one of the tools (e.g., check_database_health).
Decision Tree: Routing to the Right Analysis
User's problem → What type of issue?
│
├─ "Database is slow" (general) ──────────→ Full Performance Audit
│ Start: check_database_health → get_slow_queries → analyze_wait_events
│ Reference: [tuning-workflow.md] Phase 2-6
│
├─ Specific slow query ────────────────────→ Query Optimization
│ Start: analyze_query (EXPLAIN) → get_index_recommendations
│ Reference: [tuning-workflow.md] "Query Optimization Workflow"
│
├─ "Too many connections" / timeouts ──────→ Connection Analysis
│ Start: analyze_connections → calculate_memory_usage
│ Reference: [common-problems.md] "Too Many Connections"
│
├─ Lock waits / deadlocks ─────────────────→ Lock Diagnosis
│ Start: analyze_table_locks → analyze_innodb_transactions
│ Reference: [common-problems.md] "Lock Contention"
│
├─ Replication lag ────────────────────────→ Replication Analysis
│ Start: get_replication_status → get_slow_queries
│ Reference: [common-problems.md] "Replication Lag"
│
├─ Memory / OOM issues ────────────────────→ Memory Analysis
│ Start: calculate_memory_usage → analyze_buffer_pool
│ Reference: [configuration-recommendations.md] "Memory Settings"
│
├─ Disk space issues ──────────────────────→ Storage Analysis
│ Start: profile_schema_sizes → get_fragmented_tables → analyze_binlog
│ Reference: [common-problems.md] "Disk Space"
│
├─ Configuration review ───────────────────→ Settings Audit
│ Start: review_settings → review_optimizer_config
│ Reference: [configuration-recommendations.md]
│
├─ Index optimization ─────────────────────→ Index Review
│ Start: find_unused_indexes → get_index_recommendations
│ Reference: [tuning-workflow.md] "Index Optimization"
│
├─ Security audit ─────────────────────────→ Security Analysis
│ Start: analyze_security → analyze_user_privileges
│
├─ Health check / monitoring ──────────────→ Quick Health
│ Start: check_database_health → get_global_status_snapshot
│
├─ Table maintenance / fragmentation ─────→ Maintenance
│ Start: get_fragmented_tables → profile_schema_sizes → analyze_auto_increment
│ Reference: [common-problems.md] "Table Fragmentation", [advanced-diagnostics.md] "Table Maintenance"
│
├─ DDL stuck / metadata lock ─────────────→ Metadata Lock Diagnosis
│ Start: analyze_table_locks → get_active_queries → analyze_innodb_transactions
│ Reference: [common-problems.md] "Metadata Lock Blocking DDL"
│
└─ Advanced / beyond MCP tools ───────────→ Raw SQL Diagnosis
Reference: [tsg-diagnostic-queries.md], [advanced-diagnostics.md]
Covers: optimizer trace, errant GTIDs, DEFINER audits, delta comparison
What ships with it
6 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 9d ago First seen · 238 lines · 127 tokens per session scan A 102dcdcac80c
mysql-perf-tuning is a skill published in the GitHub repository isdaniel/mysqltuner_mcp (3 stars, last pushed 3mo ago), licensed Apache-2.0. It adds 127 tokens to every session and 2,676 once invoked, about $0.0006 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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