mcp-tool SKILL.md skillA
mcp-tool from skillberry-ai/cap-evolve is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add skillberry-ai/cap-evolve/mcp-tool@git:20260822.10e53e1Pins git:20260822.10e53e1 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- skillberry-ai/cap-evolve
- Path
skills/capabilities/mcp-tool/SKILL.md- Versions recorded
- 5
- Latest version
- git:20260822.10e53e1, committed Aug 22, 2026
- First version recorded
- Jun 20, 2026
- Size
- 8,646 bytes
- Repository stars
- 66
- License
- Apache-2.0
Optimize the tool surface of an EXTERNAL MCP server — one the agent talks to but does not implement. Use when an agent wired to an MCP server mis-selects tools, fills arguments wrong, or is offered a noisy 40-tool set it mostly ignores. Covers MCP tool descriptions, per-parameter documentation, in-description examples, and curating which of the server's tools are exposed to the model. Only those documentation-level edits are safe here: the server owns the wire inputSchema and the handler code…
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Capability: MCP tool (external server) Tools served over the [Model Context Protocol](https://modelcontextprotocol.io) come from a server the agent does not own. The **server** defines each tool's `name`, `description`, and `inputSchema` and implements the handler; the **host/client** discovers them via `tools/list`, chooses which to present to the model, and invokes them via `tools/call`. So an optimizer here can change *how the agent perceives and is offered* those tools, and nothing else. If the fix needs a tool's types, `required` fields, or behavior to change, this capability has been outgrown: negotiate the change with the server owner, or move the logic into an agent-owned tool and optimize that with the `tools` capability instead. ## The edit boundary — read this before proposing anything | Edit | Owner | Allowed here | |---|---|:--:| | tool `description`, per-parameter `description`, in-description examples | client presentation | yes | | which of the server's tools the model sees (`add` / `remove`) | client/host curation | yes | | the wire `inputSchema` — `type`, `required`, `enum`, `maximum`, `properties` (`schema`) | **server** | no | …
Read the whole file at its exact version.
How to install
mdr add skillberry-ai/cap-evolve/mcp-tool@sha256:a0a58557602916c7The line at the top of this page pins the label git:20260822.10e53e1, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_ebemuc5g4jtictqo)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Jun 20, 2026 and Aug 22, 2026, about one every 16 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260822.10e53e1 latest | 2026-08-22 | 10e53e1 | 8,646 B | A | view · diff |
| git:20260726.1a24604 | 2026-07-26 | 1a24604 | 12,323 B | A | view · diff |
| git:20260625.085b6ad | 2026-06-25 | 085b6ad | 11,684 B | A | view · diff |
| git:20260620.cbe7259 | 2026-06-20 | cbe7259 | 11,683 B | A | view · diff |
| git:20260620.e845029 | 2026-06-20 | e845029 | 10,094 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (8646 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
skillberry-ai/cap-evolve · 66 stars · license Apache-2.0 · pushed 2026-10-21 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_ebemuc5g4jtictqo GET https://markdownregistry.com/api/v1/resolve?ref=skillberry-ai/cap-evolve/mcp-tool GET https://markdownregistry.com/api/v1/blob/a0a58557602916c7e76b6090ddde8613e0a5f42b3fa73bdceeaf74448b0dc312
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.