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 skills/trayio/tray-plugins/tray-gotchasnpx skills add trayio/tray-plugins --skill tray-gotchasgit clone --depth 1 https://github.com/trayio/tray-pluginsWrote 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/trayio/tray-plugins/tray-gotchas)<a href="https://agentmods.dev/skills/trayio/tray-plugins/tray-gotchas"><img src="https://agentmods.dev/badge/skills/trayio/tray-plugins/tray-gotchas.svg" alt="Measured on agentmods" 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 | $0.00095 | $0.06844 |
| Opus 5 | $0.00048 | $0.03422 |
| Sonnet 5 | $0.00019 | $0.01369 |
| Haiku 4.5 | $0.00010 | $0.00684 |
Grade A, and why
tray-gotchas 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 5d 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 — 418 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Tray Workflow Gotchas
Consult this when debugging workflow errors or working with complex structures.
Error Quick Reference
| Error | Likely Cause | Fix |
|---|---|---|
| "Exported structure validation failed" | Malformed step properties, loop missing _loop wrapper, "next" keys in steps_structure |
Check property type-wrapping. Use get_workflow to inspect current state |
| "Connector version not found" | Wrong version | Use list_connectors to get exact version |
| "Connector unexpectedly failed" | Wrong has_dynamic_output |
Check operation's hasDynamicOutput field |
| "Required key [body] not found" | raw_http_request missing body |
Set body explicitly even for GET |
| Workflow hangs | Missing callable response in sync mode | Add callable-workflow-response step |
| trigger-reply "not configurable" | Empty inputSchema misleads researcher | Use known property structure — see Trigger Event Reply section below |
| Silent step failures | Property values not wrapped | Use {"type": "string", "value": "..."} format |
| Missing connector icon in UI | Step name includes operation (e.g., slack-send-message-1) |
Use connector name only: slack-1, never include the operation name |
| Stale version_id error | Used an old version_id after a mutating operation | Use the version_id from the error response (or from the last successful operation) |
create_auth_collection fails with "service parameter is required" |
Passed connector_name/connector_version instead of service UUID |
Call list_service_environments first to get the service UUID and service_environment_id |
list_service_environments fails with "service_name parameter is required" |
Passed service_id instead of service_name |
Use service_name (string, e.g., "google-gmail") and service_version (integer) |
update_workflow_steps with error_handling returns 400 |
Omitted auth_id on an authenticated step entry |
Always include auth_id when updating steps that have authentication, even if just setting error_handling |
String contains {{ or template syntax |
Used Handlebars/Mustache/moment.js — Tray has NO template engine | Use a script step to compose dynamic strings, then reference via jsonpath |
| Step output returns null/empty at runtime | JsonPath doesn't match the referenced step's actual output schema | Build jsonpaths from the referenced step's output schema — different step types have different shapes. Note: call_connector nests data under output, but the workflow runtime may not — always verify the runtime shape |
| Empty alert/email body inside an error branch | Used bare $.errors.message (Tray reads errors as a step name, needs the failed step's name next) or referenced the failed step's own output (empty on failure) |
Use $.errors.<failed-step-name>.<field> — fields mirror the step's output schema in snake_case (e.g. $.errors.http-client-1.message, $.errors.http-client-1.status_code). The failed step's name is the second segment |
| Workflow "passed" but downstream jsonpaths return undefined at runtime | data passed to trigger_workflow wasn't shaped like $.steps.trigger (e.g. payload at root instead of nested under body for a webhook) |
Shape data as the full trigger envelope: webhook → {body:{...}, query:{...}, headers:{...}}, callable-trigger → flat {<your fields>} (they surface at $.steps.trigger.<field>), form-trigger → {result:{...}}, agent-tool-trigger → {tool_input:{...}}. Returned fired_payload_shape is the literal $.steps.trigger — verify jsonpaths against it |
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.
- 5d ago First seen · 418 lines · 95 tokens per session scan A f85484b2f52a
tray-gotchas is a skill published in the GitHub repository trayio/tray-plugins (9 stars, last pushed 17d ago), licensed Apache-2.0. It adds 95 tokens to every session and 6,844 once invoked, about $0.0005 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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