ShotPulled

Set active equipment

set_active

Idempotent

Switch the active bean, grinder or machine for this account. The numbers come from list_beans, list_grinders and list_machines. Registering something already makes it active, so use this to switch back to something that exists, not after register_coffee.

Input Schema

TableJSON Schema

Name	Required	Description
`bean_id`	No	This account's own bean number, as returned by list_beans. Never guess one; null = leave unchanged
`grinder_id`	No	This account's own grinder number, as returned by list_grinders. Never guess one; null = leave unchanged
`machine_id`	No	This account's own machine number, as returned by list_machines. Never guess one; null = leave unchanged
`program_id`	No	A program number from the active machine's list. null = leave unchanged

Output Schema

TableJSON Schema

Name	Required	Description	Default
`status`	Yes
`message`	Yes

Schema Changelog

Changes observed during successful MCP inspections.

Changed4 schema fields changedSep 4, 2026

changedInput schema / properties / bean_id / description

Previous value: -"null = leave unchanged"New value: +"This account's own bean number, as returned by list_beans. Never guess one; null = leave unchanged"

changedInput schema / properties / grinder_id / description

Previous value: -"null = leave unchanged"New value: +"This account's own grinder number, as returned by list_grinders. Never guess one; null = leave unchanged"

changedInput schema / properties / machine_id / description

Previous value: -"null = leave unchanged"New value: +"This account's own machine number, as returned by list_machines. Never guess one; null = leave unchanged"

changedInput schema / properties / program_id / description

Previous value: -"null = leave unchanged"New value: +"A program number from the active machine's list. null = leave unchanged"

Changed1 schema field changedAug 17, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "additionalProperties": true,
+  "properties": {
+    "message": {
+      "type": "string"
+    },
+    "status": {
+      "type": "string"
+    }
+  },
+  "required": [
+    "status",
+    "message"
+  ],
+  "type": "object"
+}

Changed8 schema fields changedJul 19, 2026
- addedInput schema / properties / bean_id / description
```
Added value: +"null = leave unchanged"
```
- changedInput schema / properties / bean_id / type
```
Previous value: -"integer"New value: +[
+  "integer",
+  "null"
+]
```
- addedInput schema / properties / grinder_id / description
```
Added value: +"null = leave unchanged"
```
- changedInput schema / properties / grinder_id / type
```
Previous value: -"integer"New value: +[
+  "integer",
+  "null"
+]
```
- addedInput schema / properties / machine_id / description
```
Added value: +"null = leave unchanged"
```
- changedInput schema / properties / machine_id / type
```
Previous value: -"integer"New value: +[
+  "integer",
+  "null"
+]
```
- addedInput schema / properties / program_id / description
```
Added value: +"null = leave unchanged"
```
- changedInput schema / properties / program_id / type
```
Previous value: -"integer"New value: +[
+  "integer",
+  "null"
+]
```
First observedJun 16, 2026

TDQS

A4.2/5.0

Behavior3/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already convey idempotence, non-read-only, and non-destructive behavior. The description adds useful account scoping and source-list context, but it does not describe failure behavior or side effects beyond switching; with annotations present, this is acceptable but not rich.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Three short sentences front-load the action and resource, then give the value source and the key exclusion. There is no filler or redundant detail.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

The description plus schema and annotations are mostly complete, especially with an output schema present. A slight gap is that the prose omits the program_id component, though the schema covers it fully.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The schema descriptions already cover all four parameters at 100% and explain that null means unchanged and values come from list calls. The description reinforces the list-source idea but does not add meaningfully beyond the schema, so the baseline of 3 applies.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description opens with a specific action and resource: switching the active bean, grinder, or machine for this account. It also distinguishes itself from register_coffee by noting that registration already makes something active, so the agent clearly sees why set_active exists.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines5/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

It explicitly says the IDs come from list_beans, list_grinders, and list_machines, and it gives a concrete when-not-to-use rule: do not call this after register_coffee. This is strong usage guidance that routes the agent to the correct context.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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