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Directory / Tuatara Decide

Tuatara Decide

Q: Is Tuatara Decide MCP server safe?

QAmcp's test on 2 Nov 2026: None of the hidden-instruction wordings we know were found in its tool descriptions. Its error messages showed no secrets or internal details. 3 of its 6 tools are labeled read-only; the others may change or send things. Overall it scored 95/100 on 2 Nov 2026. A test can only see what the server shows from outside, not what it does with your data behind the scenes. Connect servers from makers you trust.

by cymetica.com · https://cymetica.com/mcp/v1/decide

Train a text classifier from your labelled examples in a minute; label texts with probabilities.

6 tools✓ no account neededPricing: on their site

See pricing →Visit website

95 /100

PASS · WITH NOTES

11 of 11 checks · 2 Nov 2026

Is Tuatara Decide MCP server safe?

None of the hidden-instruction wordings we know were found in its tool descriptions.
Its error messages showed no secrets or internal details.
3 of its 6 tools are labeled read-only; the others may change or send things.
Overall it scored 95/100 on 2 Nov 2026.

A test can only see what the server shows from outside, not what it does with your data behind the scenes. Connect servers from makers you trust.

What it can do

6 tools, in the server's own words.

register_agent

get_decide_inforead-only

Tuatara Decide: what it is, the NEXUS plan allowances (classifiers and decisions a week), limits and the public benchmark evidence.

list_decide_classifiersread-only

Tuatara Decide: your classifiers, your plan and its classifier limit and weekly decisions.

get_decide_classifierread-only

Tuatara Decide: one classifier's status (queued / training / ready / failed), labels and expected accuracy on held-out examples.

decide_create_classifier

Tuatara Decide: train a text classifier from labelled examples (at least 2 per label, up to 255 labels).

decide_predict

Tuatara Decide: label up to 256 texts with a ready classifier.

Test results

Safe mode: only tools labeled read-only were run. How the test works

!
Ready for the newest MCP version
1 warning
- !Uses an older MCP version (2025-06-18). It works today, but it isn't on the July 2026 version (2026-07-28) yet.
note
!
Follows MCP best practices (not scored yet)
1 tip (not scored)
- !1 tool answers with structured data but doesn't declare its shape (outputSchema): get_decide_info. If those answers change shape, nothing can catch it; with a schema, every answer is checked.
note
✓
ConnectsConnected in 793 ms
pass
✓
Lists its toolsFound 6 tools
pass
✓
Every tool is describedAll 6 tools and their inputs are described
pass
✓
Tools are labeled safe or dangerousEvery tool has a safety label
pass
✓
No known hidden instructionsNone of the hidden-instruction wordings we know were found in tool descriptions. New wordings can get past this check.
pass
✓
Tools work with good inputs
All good
- ✓get_decide_info: Worked (352 ms)
- ✓list_decide_classifiers: Answered with an error, probably because of our sample input: {"code": "AUTH_REQUIRED", "error": "Link your agent to an EventTrader account to use Tuatara Decide (https://cymetica.com/decide).", "messa…
- ✓get_decide_classifier: Answered with an error, probably because of our sample input: {"code": "AUTH_REQUIRED", "error": "Link your agent to an EventTrader account to use Tuatara Decide (https://cymetica.com/decide).", "messa…
- –register_agent: Not run: labeled as changing data
- –decide_create_classifier: Not run: labeled as changing data
- –decide_predict: Not run: labeled as changing data
pass
✓
Bad inputs give a clean error
All good
- ✓get_decide_classifier: Refused missing required input "classifier_id" with a clear error
- ✓get_decide_classifier: Refused wrong type for "classifier_id" with a clear error
pass
✓
Fast enough
All good
- ✓Connecting took 793 ms
- ✓Listing tools took 174 ms
- ✓Average tool answer: 431 ms
- ✓list_decide_classifiers: Slowest tool: list_decide_classifiers (689 ms)
pass
✓
No secrets leakedChecked 4 error messages: no secrets or internal details
pass
–
Tools work togetherNo tool's answer could be fed into another tool, so there were no chains to test (not counted either way)
not tested

Test it yourself

Free and open source. Same checks, same score.

npx qamcp-cli https://cymetica.com/mcp/v1/decide

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Score over time

2 Nov 202695

One test so far. New tests will show here.

Reviews

Coming soon: reviews from people who use Tuatara Decide, signed in with GitHub, one per person. Reviews never change the score.

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