ToolUniverse is a collection of tools, interfaces, and supporting components for building AI systems that perform scientific work. It is for developers creating AI scientist agents that use APIs, databases, machine-learning tools, and domain-specific utilities. The catalogue includes skills, commands, an MCP server, an agent, and a hook for working with the ecosystem.
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 mims-harvard/ToolUniverse --skill tooluniverse-population-geneticsgit clone --depth 1 https://github.com/mims-harvard/ToolUniverseWrote 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/mims-harvard/tooluniverse/tooluniverse-population-genetics)<a href="https://agentmods.dev/skills/mims-harvard/tooluniverse/tooluniverse-population-genetics"><img src="https://agentmods.dev/badge/skills/mims-harvard/tooluniverse/tooluniverse-population-genetics/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/mims-harvard/tooluniverse/tooluniverse-population-genetics"><img src="https://agentmods.dev/badge/skills/mims-harvard/tooluniverse/tooluniverse-population-genetics.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00066 | $0.05584 |
| Opus 5 | $0.00033 | $0.02792 |
| Sonnet 5 | $0.00013 | $0.01117 |
| Haiku 4.5 | $0.00007 | $0.00558 |
Grade A, and why
tooluniverse-population-genetics 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 8d 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 — 363 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Population Genetics Analysis
MC Strategy: Population genetics MC questions often test whether you know a specific theorem or result. COMPUTE the answer first (use popgen_calculator.py or write Python), then match to options. Don't try to reason about which option "sounds right."
Analyze population-level genetic variation, allele frequencies, GWAS associations, clinical significance, and evolutionary constraints using ToolUniverse tools.
When to Use
Activate this skill when the user asks about:
- Allele frequencies across populations (gnomAD, 1000 Genomes)
- GWAS associations for diseases/traits
- Clinical variant interpretation (ClinVar, VEP)
- Gene-level constraint metrics (pLI, LOEUF, o/e ratios)
- Selection, drift, linkage disequilibrium, or population structure
- Variant annotation and functional consequences
LOOK UP, DON'T GUESS
Query gnomAD/1000Genomes/GWAS Catalog FIRST for allele frequencies and associations. Preferred: use the PopGen_hwe_test, PopGen_fst, PopGen_inbreeding, and PopGen_haplotype_count tools for HWE, Fst, inbreeding, and haplotype calculations. Fallback: run popgen_calculator.py directly. For theoretical problems (delta-q, drift, LD decay), apply the formulas in the Theoretical Reasoning section below.
Tool Quick Reference
| Tool | Key Parameters | Notes |
|---|---|---|
gnomad_search_variants |
query (REQUIRED) |
Resolve rsID to variant_id format "CHR-POS-REF-ALT" |
gnomad_get_variant |
variant_id (REQUIRED), dataset |
Population frequencies. Default dataset: gnomad_r3; use gnomad_r4 for latest |
gnomad_get_gene_constraints |
gene_symbol (REQUIRED) |
pLI, o/e ratios. May timeout -- retry once |
MyVariant_query_variants |
query (REQUIRED) |
Aggregated: ClinVar + dbSNP + gnomAD + CADD. Uses hg19 coordinates |
EnsemblVEP_annotate_rsid |
variant_id (REQUIRED) |
Functional consequence, SIFT, PolyPhen. Param is "variant_id" NOT "rsid" |
EnsemblVEP_variant_recoder |
variant_id (REQUIRED) |
Convert between rsID/HGVS/VCF/SPDI |
gwas_get_snps_for_gene |
gene_symbol (REQUIRED) |
All GWAS SNPs for a gene |
gwas_search_associations |
query (REQUIRED) |
GWAS for a disease/trait (NOT gene name -- use gwas_get_snps_for_gene for genes) |
gwas_get_variants_for_trait |
trait (REQUIRED) |
Variants associated with a trait |
ClinVar_search_variants |
gene, condition, significance |
At least one filter required |
RegulomeDB_query_variant |
rsid (REQUIRED) |
Regulatory scoring (1a=strongest to 7=minimal) |
What ships with it
1 file 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.
- 8d ago First seen · 363 lines · 66 tokens per session scan A c4eca3d5f349
tooluniverse-population-genetics is a skill published in the GitHub repository mims-harvard/ToolUniverse (1,680 stars, last pushed 2d ago), licensed Apache-2.0. It adds 66 tokens to every session and 5,584 once invoked, about $0.0003 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 2026-09-03.
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