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 shwetank-dev/mcp-server-calendly --skill cancel-eventgit clone --depth 1 https://github.com/shwetank-dev/mcp-server-calendlyWrote 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/shwetank-dev/mcp-server-calendly/cancel-event)<a href="https://agentmods.dev/skills/shwetank-dev/mcp-server-calendly/cancel-event"><img src="https://agentmods.dev/badge/skills/shwetank-dev/mcp-server-calendly/cancel-event/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/shwetank-dev/mcp-server-calendly/cancel-event"><img src="https://agentmods.dev/badge/skills/shwetank-dev/mcp-server-calendly/cancel-event.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 | $0.00047 | $0.00492 |
| Opus 5 | $0.00023 | $0.00246 |
| Sonnet 5 | $0.00009 | $0.00098 |
| Haiku 4.5 | $0.00005 | $0.00049 |
Grade A, and why
cancel-event 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.
What it actually says
Cancel Event
Find and cancel a scheduled Calendly event.
Workflow
-
Identify the event
- If the user gives a UUID directly, use
get_eventto confirm it - Otherwise use
list_scheduled_eventswith a narrow time range to find it- Filter by
status: "active"so only cancellable events are shown - Match by name or look for the invitee using
list_invitees
- Filter by
- If multiple matches, present the options and ask the user to confirm which one
- If the user gives a UUID directly, use
-
Confirm before canceling
- Show the event name, date/time, and invitee(s)
- Ask the user to confirm unless they've already been explicit
- Ask if they'd like to provide a cancellation reason
-
Cancel the event
- Call
cancel_event(event_uuid, reason?)with the confirmed UUID - Pass the reason if the user provided one
- Call
Output Format
✅ Event canceled:
- Event: {event_name}
- Date: {start_time}
- Invitee(s): {invitee names}
- Reason: {reason or "none provided"}
Important Notes
- Only
activeevents can be canceled — already-canceled events will error - Cancellation is irreversible; always confirm before proceeding
- If the user says "cancel all meetings today", list them first and confirm each
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 · 70 lines · 47 tokens per session scan A b94be89e9f3f
cancel-event is a skill published in the GitHub repository shwetank-dev/mcp-server-calendly (0 stars, last pushed 6mo ago), licensed MIT. It adds 47 tokens to every session and 492 once invoked, about $0.0002 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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