Pylon MCP Server

pylon_search_contacts

Search and filter contacts by ID, email, or account ID to retrieve a compact table of results.

Instructions

Search contacts with filters. Returns compact table.

Input Schema

TableJSON Schema

Name	Required	Description
`filter`	Yes	Filter object. Each field requires an operator like {email: {string_contains: "@example.com"}}
`limit`	No	Results limit (1-100, default 50)
`cursor`	No	Pagination cursor

Schema Changelog

Changes observed during successful MCP inspections.

Changed19 schema fields changedv1.0.1May 7, 2026
- removedInput schema / properties / filter / additionalProperties
```
Removed value: -{}
```
- changedInput schema / properties / filter / description
```
Previous value: -"Filter object with fields like id, email, account_id. Supports operators: equals, in, not_in, string_contains"New value: +"Filter object. Each field requires an operator like {email: {string_contains: \"@example.com\"}}"
```
- addedInput schema / properties / filter / properties / account_id / description
```
Added value: +"Filter by account ID"
```
- addedInput schema / properties / filter / properties / account_id / properties / equals
```
Added value: +{
+  "type": "string"
+}
```
- addedInput schema / properties / filter / properties / account_id / properties / in
```
Added value: +{
+  "items": {
+    "type": "string"
+  },
+  "type": "array"
+}
```
- addedInput schema / properties / filter / properties / account_id / properties / is_set
```
Added value: +{
+  "type": "boolean"
+}
```
- addedInput schema / properties / filter / properties / account_id / properties / is_unset
```
Added value: +{
+  "type": "boolean"
+}
```
- addedInput schema / properties / filter / properties / account_id / properties / not_in
```
Added value: +{
+  "items": {
+    "type": "string"
+  },
+  "type": "array"
+}
```
- addedInput schema / properties / filter / properties / email / description
```
Added value: +"Filter by email"
```
- addedInput schema / properties / filter / properties / email / properties / equals
```
Added value: +{
+  "type": "string"
+}
```
- addedInput schema / properties / filter / properties / email / properties / in
```
Added value: +{
+  "items": {
+    "type": "string"
+  },
+  "type": "array"
+}
```
- addedInput schema / properties / filter / properties / email / properties / not_in
```
Added value: +{
+  "items": {
+    "type": "string"
+  },
+  "type": "array"
+}
```
- addedInput schema / properties / filter / properties / email / properties / string_contains
```
Added value: +{
+  "type": "string"
+}
```
- addedInput schema / properties / filter / properties / id / description
```
Added value: +"Filter by contact ID"
```
- addedInput schema / properties / filter / properties / id / properties / equals
```
Added value: +{
+  "type": "string"
+}
```
- addedInput schema / properties / filter / properties / id / properties / in
```
Added value: +{
+  "items": {
+    "type": "string"
+  },
+  "type": "array"
+}
```
- addedInput schema / properties / filter / properties / id / properties / not_in
```
Added value: +{
+  "items": {
+    "type": "string"
+  },
+  "type": "array"
+}
```
- changedInput schema / properties / limit / description
```
Previous value: -"Results limit"New value: +"Results limit (1-100, default 50)"
```
- changedInput schema / properties / limit / maximum
```
Previous value: -1000New value: +100
```
First observedv1.0.0Dec 14, 2025

TDQS

C2.9/5.0

Behavior2/5

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

With no annotations, the description carries full burden. It mentions 'returns compact table' but does not disclose read-only nature, permissions, pagination behavior, or output structure beyond a vague phrase. The tool's safety and side effects are unclear.

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

Conciseness4/5

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

The description is extremely concise at two sentences, front-loading the core purpose. However, 'Returns compact table' is somewhat vague and could be more precise without sacrificing brevity.

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

Completeness2/5

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

Given the tool's complexity (nested filter object, pagination, required parameters), the description is too minimal. It omits details about filter operators, default limit, pagination mechanics, and output format, relying entirely on the schema.

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 input schema has 100% description coverage, so the schema already documents parameter meanings. The description adds no new information beyond the schema, earning a baseline score of 3.

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

Purpose4/5

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

The description clearly states the tool searches contacts using filters and returns a compact table, effectively communicating the action and resource. However, it does not explicitly distinguish from sibling tools like pylon_list_contacts or pylon_get_contact, which could cause confusion.

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

Usage Guidelines2/5

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

No guidance is provided on when to use this tool versus alternatives. The description lacks context for when to choose search over list or get, and there are no usage examples or prerequisites.

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

pylon_search_contacts

Instructions

Input Schema

Schema Changelog

TDQS

Other Tools