HireJack

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Skill Impact

skill_impact

Read-only

Simulate adding skills you don't have and see which ones unlock the most new jobs, boost existing matches, and increase your market impact. Get a ranked list with impact scores to decide what to learn next.

Instructions

For each skill the authenticated user does NOT have, simulate adding it and compute the market impact. Pro tier. Returns a ranked list of skills with: newJobsUnlocked (jobs that previously didn't match but would after learning the skill), boostedJobs (existing matches that would score higher), companiesNeedingIt, relevantRoles, and a composite impactScore. Also returns profileCompleteness so the caller can suggest filling missing profile fields. Use for queries like 'what should I learn next?' or 'which skill would unlock the most jobs for me?'. Not for auditing the user's CURRENT skills against their target roles — use skill_gap for that.

Input Schema

TableJSON Schema

Name	Required	Description	Default
No arguments

Output Schema

TableJSON Schema

Name	Required	Description
`data`	Yes	Simulated market impact of skills the user could learn
`meta`	No	Request/response metadata (pagination cursors, snapshot timestamps, applied filters)
`citation_url`	No	hirejack.com URL to cite when surfacing this result

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedv0.3.5Jul 17, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "additionalProperties": true,
+  "properties": {
+    "citation_url": {
+      "description": "hirejack.com URL to cite when surfacing this result",
+      "type": "string"
+    },
+    "data": {
+      "additionalProperties": true,
+      "description": "Simulated market impact of skills the user could learn",
+      "properties": {
+        "currentMatchingJobs": {
+          "description": "Jobs matching the user's current skills in the sample",
+          "type": "number"
+        },
+        "learnDisclosure": {
+          "description": "Affiliate-link disclosure text when learn links are present",
+          "nullable": true,
+          "type": "string"
+        },
+        "message": {
+          "description": "Present when the profile has no skills yet",
+          "type": "string"
+        },
+        "profileCompleteness": {
+          "additionalProperties": true,
+          "properties": {
+            "hasLocation": {
+              "type": "boolean"
+            },
+            "hasName": {
+              "type": "boolean"
+            },
+            "hasResume": {
+              "type": "boolean"
+            },
+            "hasRoles": {
+              "type": "boolean"
+            },
+            "hasSeniority": {
+              "type": "boolean"
+            },
+            "hasSkills": {
+              "type": "boolean"
+            },
+            "score": {
+              "description": "Profile completeness, 0-100",
+              "type": "number"
+            }
+          },
+          "type": "object"
+        },
+        "skillImpacts": {
+          "description": "Highest-impact skills to learn, ranked (capped at 10)",
+          "items": {
+            "additionalProperties": true,
+            "properties": {
+              "avgBoostPoints": {
+                "type": "number"
+              },
+              "boostedJobs": {
+                "description": "Existing matches whose score would rise",
+                "type": "number"
+              },
+              "companiesNeedingIt": {
+                "type": "number"
+              },
+              "impactScore": {
+                "description": "Composite ranking score (unlocked x3 + boosted + companies x2 + roles x5)",
+                "type": "number"
+              },
+              "jobsMentioning": {
+                "description": "Sampled jobs mentioning the skill",
+                "type": "number"
+              },
+              "learn": {
+                "additionalProperties": true,
+                "nullable": true,
+                "properties": {
+                  "alternates": {
+                    "items": {
+                      "additionalProperties": true,
+                      "properties": {},
+                      "type": "object"
+                    },
+                    "type": "array"
+                  },
+                  "primary": {
+                    "additionalProperties": true,
+                    "description": "Recommended course link (provider, url, title, free, ...)",
+                    "nullable": true,
+                    "properties": {},
+                    "type": "object"
+                  }
+                },
+                "type": "object"
+              },
+              "newJobsUnlocked": {
+                "description": "Jobs that would newly match after learning it",
+                "type": "number"
+              },
+              "relevantRoles": {
+                "description": "Desired-role titles that list it as required",
+                "items": {
+                  "type": "string"
+                },
+                "type": "array"
+              },
+              "skillId": {
+                "type": "string"
+              },
+              "skillName": {
+                "type": "string"
+              },
+              "topCompanies": {
+                "description": "Company domains needing the skill (capped at 5)",
+                "items": {
+                  "type": "string"
+                },
+                "type": "array"
+              }
+            },
+            "type": "object"
+          },
+          "type": "array"
+        },
+        "totalJobsAnalyzed": {
+          "description": "Size of the job sample simulated against",
+          "type": "number"
+        }
+      },
+      "type": "object"
+    },
+    "meta": {
+      "additionalProperties": true,
+      "description": "Request/response metadata (pagination cursors, snapshot timestamps, applied filters)",
+      "properties": {},
+      "type": "object"
+    }
+  },
+  "required": [
+    "data"
+  ],
+  "type": "object"
+}

First observedv0.1.6Jul 11, 2026

TDQS

A4.9/5.0

Behavior5/5

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

Annotations already declare readOnlyHint=true and openWorldHint=false; the description adds that it is a simulation (no actual skill addition) and lists output fields. No contradictions, and adds meaningful behavioral context beyond annotations.

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 sentences: purpose, output details, usage guidance. Front-loaded and every sentence adds value. No fluff.

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

Completeness5/5

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

Given zero parameters, an output schema exists, and sibling tools are listed, the description covers purpose, usage, output structure, and distinguishes from related tools. Complete for an agent to decide when and how to invoke.

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

Parameters4/5

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

No parameters (0 params), so baseline is 4. The description does not need to add parameter information and appropriately focuses on behavior and output.

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 clearly states the tool simulates adding each missing skill and computes market impact, returning a ranked list. It explicitly distinguishes from sibling 'skill_gap' by noting it's not for auditing current skills.

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?

Provides explicit use cases ('what should I learn next?', 'which skill would unlock the most jobs?') and a clear when-not-to-use ('not for auditing... use skill_gap'), naming the alternative tool.

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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